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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 |
---|---|---|---|---|---|---|---|---|---|
#592520 | #9315. Rainbow Bracket Sequence | Ashbourne | WA | 1ms | 3964kb | C++14 | 3.5kb | 2024-09-26 23:09:31 | 2024-09-26 23:09:31 |
Judging History
answer
#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N = 2555;
const int INF = 0x3f3f3f3f;
struct Edge{
int to, cap, wt, next;
}edge[N * 100];
int tot = 1, head[N];
int s, t, cnt = 1, num;
void add(int u, int v, int w, int x){
edge[++tot] = {v, w, x, head[u]};
head[u] = tot;
edge[++tot] = {u, 0, -x, head[v]};
head[v] = tot;
}
int dis[N], vis[N], maxflow = 0;
void SPFA(){
queue<int> que;
memset(dis, 0x3f, sizeof dis[0] * (num + 1));
que.push(s);
vis[s] = 1, dis[s] = 0;
while(!que.empty()){
int u = que.front();
que.pop();
vis[u] = 0;
for(int i = head[u]; i; i = edge[i].next){
int v = edge[i].to;
if(edge[i].cap && dis[v] > dis[u] + edge[i].wt){
dis[v] = dis[u] + edge[i].wt;
if(!vis[v]) que.push(v), vis[v] = 1;
}
}
}
}
int dis_dij[N], cur[N];
struct node{
int dis, u;
friend bool operator < (node a, node b){
return a.dis > b.dis;
}
};
bool dij(){
priority_queue<node> que; // greater number should change
memset(dis_dij, 0x3f, sizeof dis_dij[0] * (num + 1));
dis_dij[s] = 0;
que.push({0, s});
while(!que.empty()){
int u = que.top().u;
que.pop();
if(vis[u] == cnt) continue;
vis[u] = cnt; cur[u] = head[u];
for(int i = head[u]; i; i = edge[i].next){
int v = edge[i].to;
if(edge[i].cap && dis_dij[v] > dis_dij[u] + edge[i].wt + dis[u] - dis[v]){
dis_dij[v] = dis_dij[u] + edge[i].wt + dis[u] - dis[v];
if(vis[v] != cnt) que.push({dis_dij[v], v});
}
}
}
return dis_dij[t] < INF;
}
int dfs(int u, int flow){
if(u == t) return flow;
int ret = 0, x;
vis[u] = cnt;
for(int i = cur[u]; i; i = cur[u]){
cur[u] = edge[i].next;
int v = edge[i].to;
if(edge[i].cap == 0 || vis[v] == cnt || dis_dij[v] != dis_dij[u] + edge[i].wt + dis[u] - dis[v]) continue;
x = dfs(v, min(flow, edge[i].cap));
if(x){
flow -= x; ret += x;
edge[i].cap -= x, edge[i ^ 1].cap += x;
maxflow += x * edge[i].wt;
if(flow == 0) break;
}
}
vis[u] = 0;
return ret;
}
int dinic(){
int flow = 0;
SPFA();
while(dij()){
++cnt, flow += dfs(s, INF);
for(int i = 1; i <= num; ++ i) dis[i] += dis_dij[i];
}
return flow;
}
void clear(){
memset(head, 0, sizeof head);
tot = 1; cnt = 1; maxflow = 0;
memset(vis, 0, sizeof vis);
}
void solve(){
clear();
int n, m, sum = 0, num1 = 0;
cin >> n >> m;
vector<int> l(m + 1), col(2 * n + 1), val(2 * n + 1);
for(int i = 1; i <= m; ++ i) cin >> l[i], sum += l[i];
for(int i = 1; i <= 2 * n; ++ i) cin >> col[i];
for(int i = 1; i <= 2 * n; ++ i) cin >> val[i];
int tot = m + 2 * n;
s = tot + 3, t = tot + 4; num = tot + 4;
for(int i = 1; i <= m; ++ i){
add(tot + 1, i, INF, 0);
add(s, i, l[i], 0);
}
for(int i = 1; i <= 2 * n; ++ i){
add(col[i], m + i, 1, -val[i]);
if(i & 1) num1++, add(m + i, t, 1, 0);
add(m + i, m + i + 1, n - num1, 0);
}
sum = n - sum;
if(sum < 0) {
cout << -1 << endl;
return;
}
add(s, tot + 1, sum, 0);
int flow;
flow = dinic();
// cout << flow << endl;
if(flow != n){
cout << -1 << endl;
return;
}
cout << -maxflow << endl;
}
signed main(){
ios::sync_with_stdio(0);
int T; cin >> T;
while(T--){
solve();
}
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3704kb
input:
2 3 2 1 2 1 2 2 2 1 2 3 1 4 2 2 1 3 2 2 2 1 2 2 2 1 2 3 1 4 2 2 1
output:
9 -1
result:
ok 2 number(s): "9 -1"
Test #2:
score: 0
Accepted
time: 1ms
memory: 3568kb
input:
50 8 6 0 2 2 0 3 1 3 5 1 1 5 3 5 2 3 2 2 1 2 2 4 6 998133227 879226371 59632864 356493387 62611196 827258251 296576565 204244054 812713672 780267148 614679390 447700005 102067050 544546349 116002772 761999375 1 1 1 1 1 343766215 374461155 3 1 2 1 1 1 1 1 1 796323508 303640854 701432076 853325162 610...
output:
-1 343766215 2351080746 3426965219 -1 -1 1351561190 2539318868 1013080942 4656646546 -1 -1 2231197660 2719131728 3983627641 4712174168 -1 1046749330 6115214757 3920988203 -1 3902088946 -1 2566553992 5268471900 5977120748 7505501534 -1 5054275471 1467678317 883992368 1044562986 -1 4024634503 -1 14472...
result:
ok 50 numbers
Test #3:
score: 0
Accepted
time: 1ms
memory: 3776kb
input:
25 20 4 0 0 0 1 2 2 2 2 4 4 4 1 2 2 2 1 3 4 1 3 4 4 3 1 3 2 1 4 2 2 4 1 2 2 3 3 4 1 3 1 4 1 2 1 569363376 821862673 89663213 862407789 442940149 823902948 903631686 838830270 645793571 397350060 806574247 373166844 448916252 435880456 969841293 998227951 276194969 654967687 396909705 696186514 16992...
output:
16418796680 10558213381 -1 1502390329 8534183652 13571062458 8007768610 12656453595 3378659874 8410746077 12352187024 5743130624 5952844559 2285684441 4242613506 836778846 4838639494 8586807028 8535185475 8089358175 5627473863 14399529671 -1 11483578919 4919631490
result:
ok 25 numbers
Test #4:
score: -100
Wrong Answer
time: 1ms
memory: 3964kb
input:
83 6 5 1 0 1 1 0 2 4 4 5 3 2 4 5 3 3 3 3 597659626 649040970 33207011 223207847 960704874 418600362 658594226 417168695 767527655 622701955 867509363 235369723 6 2 0 0 1 1 2 2 2 2 1 1 1 2 2 1 405752009 976807343 267881918 26193206 947664189 555835767 587219021 231445627 755417826 541362608 846129246...
output:
-1 4518989634 3550182642 4529809699 4042429510 4145000717 -1 3635082691 -1 -1 3476472607 3732904849 3631909633 4479534795 -1 3380039505 2946284506 3615784040 -1 -1 -1 4940773463 3195952843 4073152216 4177883697 3398540362 3578975642 4308395607 -1 3078447178 3069102942 3135294474 5256676097 -1 327863...
result:
wrong answer 15th numbers differ - expected: '3586223781', found: '-1'