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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#300844 | #7970. 三步棋 | defyers# | AC ✓ | 1ms | 3508kb | C++20 | 4.9kb | 2024-01-08 21:46:20 | 2024-01-08 21:46:21 |
Judging History
answer
#include "bits/stdc++.h"
using namespace std;
#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")
using ll = long long;
using LL = long long;
int dx[5] = {0, -1, 0, 0, 1};
int dy[5] = {0, 0, -1, 1, 0};
bool ok[1 << 25], vis2[1 << 25];
int check(int x) {
vector<int> dsu(25);
iota(dsu.begin(), dsu.end(), 0);
auto find = [&](auto && find, int x) {
if (dsu[x] == x) return x;
else return dsu[x] = find(find, dsu[x]);
};
vector<string> s(5);
for (int i = 0; i < 5; i++) {
s[i] = ".....";
for (int j = 0; j < 5; j++) {
if (x >> (i * 5 + j) & 1) {
s[i][j] = 'o';
}
}
}
bool _ok = false;
for(int i = 0; i < 5; i++){
if(s[0][i] == 'o') _ok = true;
}
if(!_ok) return -1;
_ok = false;
for(int i = 0; i < 5; i++){
if(s[i][0] == 'o') _ok = true;
}
if(!_ok) return -1;
for (int i = 0; i < 5; i++) {
for (int j = 0; j < 5; j++) {
if (s[i][j] != 'o') continue;
for (int d = 1; d <= 4; d++) {
int x = i + dx[d];
int y = j + dy[d];
if (x < 0 || x >= 5 || y < 0 || y >= 5 || s[i][j] != 'o' || s[x][y] != 'o') continue;
int id1 = i * 5 + j;
int id2 = x * 5 + y;
dsu[find(find, id1)] = find(find, id2);
}
}
}
int par = -1;
for (int i = 0; i < 5; i++) {
for (int j = 0; j < 5; j++) {
if (s[i][j] == 'o') {
if (par == -1) {
par = find(find, i * 5 + j);
}
else {
if (find(find, i * 5 + j) != par) {
return -1;
}
}
}
}
}
int C = 0;
for (int i = 0; i < 5; i++) {
for (int j = 0; j < 5; j++) {
if (i < 4 && j < 4) {
if (s[i][j] == 'o' && s[i + 1][j] == 'o' && s[i][j + 1] == 'o' && s[i + 1][j + 1] == 'o') {
return 0;
cout << "Away\n";
// return;
}
}
if (s[i][j] == 'o') ++C;
}
}
vector<int> v;
for (int ox = -4; ox <= 4; ox++) {
for (int oy = -4; oy <= 4; oy++) {
int state = 0;
int cnt = 0;
for (int i = 0; i < 5; i++) {
for (int j = 0; j < 5; j++) {
int x = ox + i;
int y = oy + j;
if (x >= 0 && x < 5 && y >= 0 && y < 5 && s[x][y] == 'o') {
++cnt;
state = state | (1 << (i * 5 + j));
}
}
}
if (cnt == C) {
// cout << "@" << cnt << " " << C << " " << state << endl;
v.push_back(state);
}
}
}
vector<int> rmv;
auto dfs2 = [&](auto &&dfs2, int state, int cnt) -> bool {
if (vis2[state]) {
return ok[state];
}
bool matched = false;
for (auto x: v) {
if ((state & x) == x) {
// cout << "!" << state << " " << x << endl;
// for (int i = 0; i < 5; i++) {
// for (int j = 0; j < 5; j++) {
// int id = i * 5 + j;
// if ((state >> id) & 1) {
// cout << 'o';
// }
// else {
// cout << '.';
// }
// }
// cout << "\n";
// }
bool ret = (cnt % 3 != 0);
rmv.push_back(state);
vis2[state] = true;
ok[state] = ret;
return ret;
}
}
bool ret = false;
for (int i = 0; i < 25; i++) {
if ((state >> i) & 1) {
}
else {
if (!dfs2(dfs2, state | (1 << i), cnt + 1)) {
ret = true;
break;
}
}
}
rmv.push_back(state);
vis2[state] = true;
ok[state] = ret;
return ret;
};
dfs2(dfs2, 0, 0);
for (auto x: rmv) {
vis2[x] = false;
}
if (ok[0]) {
return 1;
cout << "Far\n";
}
else {
return 0;
cout << "Away\n";
}
}
map<int, bool> M;
void solve(int TC) {
vector<string> s(5);
for (int i = 0; i < 5; i++) {
cin >> s[i];
}
int dx = 5, dy = 5;
for(int i = 0; i < 5; i++){
for(int j = 0; j < 5; j++){
if(s[i][j] == 'o'){
dx = min(dx, i);
dy = min(dy, j);
}
}
}
char t[5][5];
for(int i = 0; i < 5; i++){
for(int j = 0; j < 5; j++){
t[i][j] = '.';
}
}
for(int i = 0; i < 5; i++){
for(int j = 0; j < 5; j++){
if(i >= dx && j >= dy){
t[i - dx][j - dy] = s[i][j];
}
}
}
int msk = 0;
for(int i = 0; i < 5; i++){
for(int j = 0; j < 5; j++){
msk |= (t[i][j] == 'o') << (i * 5 + j);
}
}
// cout << msk << endl;
cout << (M[msk] ? "Far\n" : "Away\n");
}
void gen() {
for (int i = 1; i < (1 << 25); i++) {
bitset<25> bs(i);
if (bs.count() <= 4) {
int ret = check(i);
if (ret == -1) continue;
cout << "M[" << i << "] = " << ret << ";" << endl;
}
}
}
int32_t main() {
M[1] = 0;
M[3] = 1;
M[7] = 0;
M[15] = 0;
M[33] = 1;
M[35] = 0;
M[39] = 1;
M[67] = 0;
M[71] = 1;
M[97] = 0;
M[98] = 0;
M[99] = 0;
M[102] = 1;
M[135] = 1;
M[195] = 1;
M[225] = 1;
M[226] = 1;
M[228] = 1;
M[1057] = 0;
M[1059] = 1;
M[1121] = 1;
M[1122] = 1;
M[2115] = 1;
M[2145] = 1;
M[2146] = 1;
M[3105] = 1;
M[3138] = 1;
M[33825] = 0;
// gen();
// return 0;
cin.tie(0)->sync_with_stdio(0);
cout << fixed << setprecision(10);
int t = 1;
cin >> t;
for (int i = 1; i <= t; i++) {
solve(i);
}
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 3508kb
input:
200 ..... ..oo. ..... ..... ..... ..... ..... oo... o.... ..... ..... .o... oo... ..... ..... ..... ..... o.... oo... ..... ..... ...o. ..oo. ..... ..... ..... ....o ..... ..... ..... ..... ..... ..... .ooo. .o... ..... ..... ..... ..... ...oo .o... .o... .o... ..... ..... ..... ..... ..oo. ..... .....
output:
Far Away Away Away Away Away Far Far Away Far Away Far Far Away Far Away Far Away Away Away Far Away Far Away Away Away Away Far Far Far Far Away Far Away Far Away Far Away Away Far Away Away Far Far Away Far Far Away Far Away Away Away Away Away Away Far Away Far Away Away Away Away Far Away Far Fa...
result:
ok 200 lines
Test #2:
score: 0
Accepted
time: 1ms
memory: 3468kb
input:
200 ...oo ..oo. ..... ..... ..... ..... ..ooo ....o ..... ..... ..... o.... oo... .o... ..... ..... .ooo. ...o. ..... ..... ..... .oo.. ..oo. ..... ..... ..... ...o. ...o. ...o. ...o. ..... .oo.. ..o.. ..o.. ..... ..o.. ..ooo ..... ..... ..... ..... .oooo ..... ..... ..... ..... ..... o.... oo... o....
output:
Far Far Far Far Far Away Far Far Away Far Far Far Far Away Far Far Far Far Far Far Far Far Far Far Far Away Far Far Far Far Away Far Away Far Far Far Away Far Far Far Far Far Far Far Far Away Far Far Far Far Far Far Away Far Away Far Far Far Away Away Far Far Far Far Away Far Far Far Far Far Far Far...
result:
ok 200 lines