QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#367592 | #2364. Endgame | kevinyang# | WA | 1ms | 3636kb | C++17 | 1.7kb | 2024-03-26 09:13:47 | 2024-03-26 09:13:47 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define int long long
mt19937_64 rng(std::chrono::system_clock::now().time_since_epoch().count());
bool solve(int a, int b, int c, int d, vector<int>&x, vector<int>&y){
int n = x.size();
// can (a,b) move two moves to capture (c,d)
map<pair<int,int>,int>hm;
for(int i = 0; i<n; i++){
hm[{a+x[i],b+y[i]}] = 1;
}
if(hm.count({c,d}))return true;
for(int i = 0; i<n; i++){
if(hm.count({c-x[i],d-y[i]})){
return true;
}
}
return false;
}
signed main(){
cin.tie(nullptr)->sync_with_stdio(false);
int n;
cin >> n;
vector<int>x(n);
vector<int>y(n);
int a,b,c,d;
cin >> a >> b >> c >> d;
for(int i = 0; i<n; i++){
cin >> x[i] >> y[i];
}
if(solve(a,b,c,d,x,y)){
cout << "Alice wins\n";
return 0;
}
if(n<=1000){
vector<vector<bool>>vis(n+1,vector<bool>(n+1));
for(int i = 0; i<n; i++){
for(int j = 0; j<n; j++){
int nx = c+x[i]+x[j];
int ny = d+y[i]+y[j];
if(nx>=1 && nx<=n && ny>=1 && ny<=n){
vis[nx][ny] = 1;
}
}
int nx = c+x[i];
int ny = d+y[i];
if(nx>=1 && nx<=n && ny>=1 && ny<=n){
vis[nx][ny] = 1;
}
}
for(int i = 1; i<=n; i++){
for(int j = 1; j<=n; j++){
if(i==c && j==d)continue;
if(!vis[i][j]){
cout << "tie " << i << ' ' << j << '\n';
return 0;
}
}
}
cout << "Bob wins\n";
return 0;
}
for(int iters = 0; iters<50; iters++){
int ax = c; int ay = d;
while(ax == c && ay == d){
ax = rng()%n+1;
ay = rng()%n+1;
}
if(solve(c,d,ax,ay,x,y)){
continue;
}
cout << "tie " << ax << ' ' << ay << endl;
return 0;
}
cout << "Bob wins\n";
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3612kb
input:
3 2 3 1 3 1 0 0 -1 1 -1
output:
Bob wins
result:
ok
Test #2:
score: 0
Accepted
time: 0ms
memory: 3636kb
input:
3 3 3 1 1 1 0 1 1 0 1
output:
Bob wins
result:
ok
Test #3:
score: 0
Accepted
time: 0ms
memory: 3548kb
input:
3 2 2 3 1 -1 0 -1 1 0 1
output:
Bob wins
result:
ok
Test #4:
score: -100
Wrong Answer
time: 0ms
memory: 3612kb
input:
5 2 1 1 2 -2 2 1 -1 1 1 2 2 3 3
output:
Alice wins
result:
wrong answer Author claims 'alice', but judge claims 'tie'