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QOJ
| ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
|---|---|---|---|---|---|---|---|---|---|
| #99584 | #4231. Rafting Trip | Anwar_Gehad_Maghraby | AC ✓ | 58ms | 54588kb | C++23 | 4.5kb | 2023-04-23 06:52:18 | 2023-04-23 06:52:22 |
Judging History
answer
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 500 + 4;
const int MOD = 1e9 + 7 ;
int n, m;
char a[N][N] ;
int vis[N*N + 3];
int dx[]={0,0,1,-1};
int dy[]={1,-1,0,0};
int adj[N*N + 10] ;
vector<int> ad[N*N + 10] ;
int ind[N][N] ;
int x[N*N + 3] , y[N*N + 3];
void add_cycle(int root){
int cur= adj[root];
while(cur != root){
ind[x[cur]][y[cur]]= root;
cur= adj[cur];
}
}
void dfs1(int node){
vis[node]= 1;
int nxt= adj[node];
if(!vis[nxt]){
dfs1(nxt);
}else if(vis[nxt] == 1){
add_cycle(nxt);
}
vis[node]= 2;
}
vector< pair<int ,int > > gr[N*N + 3] ;
bool taken[N][N] ;
vector<pair<int ,int > > by_me[N*N] ;
vector<int> is_r(N*N + 4 , 1) ;
int dfs(int i , int p = -1)
{
int sc =0 ;
for(auto ch : gr[i] )
{
if( !taken[ch.first][ch.second] )
{
sc++ ;
taken[ch.first][ch.second] =1 ;
by_me[i].push_back(ch) ;
}
}
int te =0 ;
for(int ch : ad[i] )
{
if(ch == p) continue;
te = max(te , dfs(ch , i) ) ;
}
sc += te ;
for(auto ch : by_me[i])
{
taken[ch.first][ch.second] = 0 ;
}
return sc ;
}
int main()
{
cin.tie(0);cin.sync_with_stdio(0);
cout.tie(0);cout.sync_with_stdio(0);
cin >> n >> m;
for (int i = 0; i < N; ++i) {
for (int j = 0; j < N; ++j) {
a[i][j] = '.' ;
}
}
for (int i = 1; i <= n; ++i) {
for (int j = 1; j <= m; ++j) {
cin >> a[i][j] ;
}
}
memset(ind , -1 , sizeof ind) ;
memset(adj , -1 , sizeof -1) ;
for(int i =1 ; i <= n; i++)
{
for (int j = 1; j <= m; ++j) {
if(a[i][j] != '.' && a[i][j] != '#')
{
ind[i][j] = (i-1)*m + j ;
x[ (i-1)*m + j ] = i ;
y[ (i-1)*m + j] = j ;
}
}
}
for (int i = 1; i <= n; ++i) {
for(int j =1 ; j <= m; j++)
{
if (a[i][j] == '>' && ~ind[i][j+1] ) {
adj[ ind[i][j] ] = ind[i][j+1] ;
} else if (a[i][j] == 'v' && ~ind[i+1][j] ) {
adj[ ind[i][j] ] = ind[i+1][j] ;
} else if (a[i][j] == '<' && ~ind[i][j-1] ) {
adj[ ind[i][j] ] = ind[i][j-1] ;
} else if( a[i][j] == '^' && ~ind[i-1][j] ) {
adj[ ind[i][j] ] = ind[i-1][j] ;
}
}
}
for(int i= 1; i <= n ; i++)
{
for(int j =1 ; j <= m; j+=1)
{
if(~ind[i][j] && vis[(i-1)*m + j ] == 0) dfs1( (i-1)*m + j ) ;
}
}
for (int i = 1; i <= n; ++i) {
for(int j =1 ; j <= m; j++)
{
if (a[i][j] == '>' && ~ind[i][j+1] && ind[i][j+1] != ind[i][j] ) {
ad[ ind[i][j+1] ].push_back(ind[i][j] ) ;
is_r[ind[i][j]] = 0 ;
} else if (a[i][j] == 'v' && ~ind[i+1][j] && ind[i+1][j] != ind[i][j] ) {
ad[ ind[i+1][j] ].push_back(ind[i][j] ) ;
is_r[ind[i][j]] = 0 ;
} else if (a[i][j] == '<' && ~ind[i][j-1] && ind[i][j-1] != ind[i][j] ) {
ad[ ind[i][j-1] ].push_back(ind[i][j] ) ;
is_r[ind[i][j]] = 0 ;
} else if( a[i][j] == '^' && ~ind[i-1][j] && ind[i-1][j] != ind[i][j]) {
ad[ ind[i-1][j] ].push_back(ind[i][j] ) ;
is_r[ind[i][j]] = 0 ;
}
}
}
for(int i = 1; i <= n; i++) {
for(int j = 1; j <= m ; j++)
{
if(a[i][j] == '#')
{
for (int k = 0; k < 4; ++k) {
if( ~ind[i+dx[k]][j + dy[k]] ) gr[ ind[i+dx[k]][j+dy[k]] ].push_back({i , j} ) ;
}
}
}
}
for(int i = 0 ; i <= N * N ; i++) sort( gr[i].begin() , gr[i].end() ) , gr[i].erase(unique(gr[i].begin() , gr[i].end()) , gr[i].end()) ;
int ans =0 ;
for(int i =1; i <= n; i++)
{
for(int j= 1; j <= m; j++)
{
int id = (i-1)*(m) + j;
if(is_r[id] && ~ind[i][j] && ind[i][j] == id) ans = max(ans , dfs(id) ) ;
}
}
cout << ans ;
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 6ms
memory: 24476kb
input:
5 6 v<<<#v v#v<.> >>v<<< ..v##^ #<<<.^
output:
4
result:
ok single line: '4'
Test #2:
score: 0
Accepted
time: 1ms
memory: 24536kb
input:
4 5 >v<<. ^<..# #...# .#>^#
output:
2
result:
ok single line: '2'
Test #3:
score: 0
Accepted
time: 4ms
memory: 23116kb
input:
4 6 >>v#>v ^#>>^v ^<<#v< .#^<<#
output:
5
result:
ok single line: '5'
Test #4:
score: 0
Accepted
time: 3ms
memory: 23488kb
input:
6 6 ^.>>>> ^..... ^....v ^....v #....v <<<<#v
output:
2
result:
ok single line: '2'
Test #5:
score: 0
Accepted
time: 6ms
memory: 23768kb
input:
6 7 ^>>>>>v ^.....v ^.#^..v ^.#^<.v ^.....v ^<<<<<<
output:
2
result:
ok single line: '2'
Test #6:
score: 0
Accepted
time: 8ms
memory: 24232kb
input:
3 7 >v<<<<# ^<##### #^<<<<<
output:
6
result:
ok single line: '6'
Test #7:
score: 0
Accepted
time: 3ms
memory: 24324kb
input:
3 5 ><.v# ##.^# ...#.
output:
3
result:
ok single line: '3'
Test #8:
score: 0
Accepted
time: 0ms
memory: 24332kb
input:
7 3 ### #># ### ... ### #>. ###
output:
4
result:
ok single line: '4'
Test #9:
score: 0
Accepted
time: 1ms
memory: 24232kb
input:
2 2 >. .#
output:
0
result:
ok single line: '0'
Test #10:
score: 0
Accepted
time: 1ms
memory: 24636kb
input:
2 2 .. .v
output:
0
result:
ok single line: '0'
Test #11:
score: 0
Accepted
time: 49ms
memory: 47780kb
input:
498 498 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<...
output:
41195
result:
ok single line: '41195'
Test #12:
score: 0
Accepted
time: 39ms
memory: 50588kb
input:
500 500 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
output:
24926
result:
ok single line: '24926'
Test #13:
score: 0
Accepted
time: 12ms
memory: 39712kb
input:
500 500 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
output:
24924
result:
ok single line: '24924'
Test #14:
score: 0
Accepted
time: 26ms
memory: 32280kb
input:
500 500 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
output:
2056
result:
ok single line: '2056'
Test #15:
score: 0
Accepted
time: 50ms
memory: 33624kb
input:
500 500 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
output:
970
result:
ok single line: '970'
Test #16:
score: 0
Accepted
time: 53ms
memory: 37004kb
input:
500 500 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
output:
687
result:
ok single line: '687'
Test #17:
score: 0
Accepted
time: 58ms
memory: 37176kb
input:
500 500 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
output:
481
result:
ok single line: '481'
Test #18:
score: 0
Accepted
time: 37ms
memory: 32196kb
input:
500 500 .>^v.^<<^<<<<<<....><v#....^.#.^..#.^<<<<#..#.><v.v..>>^<<..###..^<v..#>>>#.....^>^#.##.#......#.....#v#.>v.v#..##.#.^>>>>>v..#.v<..^...^..^#....#..>v.#^<..^^v..^.....vv..v...#^.v>>v#.#.#..#.v.^v<<......^#<.v...v>>^^<^#..^^v.^..^..^...#.#.^...^^<<<...##...v.........^.^.....>>>>>#.....><<<^.....
output:
13
result:
ok single line: '13'
Test #19:
score: 0
Accepted
time: 47ms
memory: 34900kb
input:
500 499 <<<<<#v.^.^v>v<^^.^<>><>^.^v.><^.v^<.^^#..v#>>><<<v^<>>^>>v<<<<^^^^#<>v>^<>>>^>^<<<#^^#v<<<<<<<<v>#v<<v^v.v^<<^<##><<^^<>^<#^^.^#>v^<<^>>>>v^.^>>^<#^>v^#<<<<^><^#.v^>^.^^v<.#^<<<v.v^^^#^<<.>^^#vvv<<^..>#v<.^<<<>>v>>>^.#v#>>#^<<^v<.>^#^.><^<>#^<<^^^^<<<<.><..><<#^<<>>>>>>>^^<>#>v<><#^^><v<><>...
output:
13
result:
ok single line: '13'
Test #20:
score: 0
Accepted
time: 29ms
memory: 34684kb
input:
499 500 v^^.#<^^^..>^.v^<^<<v>^<<^>^#^^v^.>vv<v.>v.^<<<<<.v.^>>v<^#v##<^<<<vv^^^^^.>^v...#>v#.#v^^>^<<>v>>v#<><v>#vv<>>v^.>v<^<v>^#>^<<<>^>v^^..vv<<<v#<<.^^<<.v^<>^<<v^<><<vvv#<<v.##^><vv^>^>^v^##>v>>>^^v.#>^.^.^#.v<<<<^#.^^<^^#.>v.#^<^^^..v<>v<.#.^.v#v^..#>v<vv<<<<<>#v^v.#>#..><>>^...^.#><^>>>>>>>>...
output:
12
result:
ok single line: '12'
Test #21:
score: 0
Accepted
time: 42ms
memory: 34132kb
input:
500 500 ^v>>v>v<>>>^#>v<^<>>>>v<<<^v.>^><.v>v<>^>vv^v>>><.>^v>>#^<<<>^<vv^^>>>v<v.^^v>v<vv<^>vv^<<vv<^^^^>>^^<^>>^^>>#<v^>v>>^<v<#<<vv<<<<<<<<<<<<<<<<<<^^v>^^<^^^v^<<#><<><>^>^>>>v<>>v><<^^<v^v<>>>^<v>>^vv>>v>>>v>v.v.v<v>#^<<<<<<<<<<.>v>^<<<<><^v<>v#<.^>^>^vv.v<>^v#<##^v^>^#v<v<<<<>>>#^>v>>>>>v^^>>^...
output:
11
result:
ok single line: '11'
Test #22:
score: 0
Accepted
time: 10ms
memory: 29572kb
input:
500 500 ######<##############^#####>########v##########v###############################<######<#####>######v########################v####v##########>######v####<##########^#<##################<#####<########v#######<^####^v#####################^v####>#########^###########.v####<##########v##########...
output:
10
result:
ok single line: '10'
Test #23:
score: 0
Accepted
time: 44ms
memory: 34428kb
input:
500 500 <^^<^>><##<v>^>>#<^>v<^v<^^^<<><^^^<^v<^<^^^v#v<<<vv<vv^>>>>>>><vv<<<<>vv^^<^^>><<^<^>^<>^><v>^>^vv>^>^><<^v>^<<>vvv><>>>>>^vv>>#<>>>^^<v<<<^>v^^^<#<<^v^<<>>>>><##^>>#<<<<<<<<^><<<<<<^v^vv.^><>v^^v<v^>vv#^<<<^<<>#>^>>v>^>^^<^>>>^<v<<<v#v^>^^^<^<>^^<vv<<<#>v<v<^v^#^^>>>>^v^^<<>>#>>v<<<<v^<vv>...
output:
14
result:
ok single line: '14'
Test #24:
score: 0
Accepted
time: 1ms
memory: 24800kb
input:
500 2 <v .# .# vv #< v^ <> <^ v. #> ># v^ #< ^# #< >v <> ^. #. << #< >> ># >> #< #v ^# << #^ #v #^ ^. ^# v# ## #> << #^ v^ <v ^# ^> ># .v #^ <# ## .v ># ## ^# ^< ^^ <# .> <^ v< >< <v #v ## #> #> ## ## ^# v> >< .^ v# #^ v> <v ## ## #> >v #v >< .# #. ^# #. ># v< ># #< <^ ^# #. <> #^ .v ## .v .v .# >> ...
output:
6
result:
ok single line: '6'
Test #25:
score: 0
Accepted
time: 9ms
memory: 23088kb
input:
2 500 v##v#>>>>^>>#.##<<.>>^#.v^>^^>##^>^^##v^^#.^<#<###<##v#^>^^.v>v#<^<<##^#^.#<##>#>>#v#>^#vv.^v#>v.####.>#.>>v#<.>#^..#<v##>>>^#v###^<#^#<#^^#>v^>###>>>><#^#v>v.v<^.#v.v##<.####<<<^#>^#^#<#>v#>#>^#>##.>>>^^<##<^^<v<...#v#.#<>>>>#.##.v#<.##.^#<^>#<<vv^>^#^..#<^##^^#<<##.vv<v^#<><.#<<.^^##^.#<v.##...
output:
5
result:
ok single line: '5'
Test #26:
score: 0
Accepted
time: 32ms
memory: 49520kb
input:
500 500 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
output:
31270
result:
ok single line: '31270'
Test #27:
score: 0
Accepted
time: 21ms
memory: 54588kb
input:
500 500 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
output:
123584
result:
ok single line: '123584'
Test #28:
score: 0
Accepted
time: 23ms
memory: 34828kb
input:
500 500 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
output:
331
result:
ok single line: '331'
Test #29:
score: 0
Accepted
time: 40ms
memory: 39016kb
input:
500 500 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
output:
1234
result:
ok single line: '1234'
Test #30:
score: 0
Accepted
time: 17ms
memory: 34848kb
input:
500 500 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
output:
281
result:
ok single line: '281'
Test #31:
score: 0
Accepted
time: 31ms
memory: 38992kb
input:
500 500 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
output:
996
result:
ok single line: '996'