Submission #1013890

#	Time	Username	Problem	Language	Result	Execution time	Memory
1013890		vjudge1	Tales of seafaring (POI13_mor)	C++17	0 / 100	431 ms	131072 KiB

mor

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
vector<bool> vis(5006);
vector<ll> v[5006];
ll dis[5006][5006],win[5006];
bool b[5006][5006];
ll n,m;
void bfs(ll i){
    queue<pair<ll,ll>> q;
    q.push({i,0});
    bool vi[5006]={};
    dis[i][i]=0;
    b[i][i]=1;
    vi[i]=1;
    while(!q.empty()){
        pair<ll,ll> x=q.front();
        q.pop();
        for(int j=0;j<v[x.first].size();j++){
            if(!vi[v[x.first][j]]){
                vi[v[x.first][j]]=1;
                dis[i][v[x.first][j]]=x.second+1;
                b[i][v[x.first][j]]=1;
                q.push({v[x.first][j],x.second+1});
            }
            else{
                if(dis[i][v[x.first][j]]%2!=(dis[i][x.first]+1)%2){
                    win[v[x.first][j]]=(dis[i][x.first]+1)-dis[i][v[x.first][j]];
                }
            }
        }
    }
}
int main() {
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    ll q;
    cin>>n>>m>>q;
    for(int i=0;i<m;i++){
        ll x,y;
        cin>>x>>y;x--;y--;
        v[x].push_back(y);
        v[y].push_back(x);
    }
    for(int i=0;i<n;i++)bfs(i);
    for(int i=0;i<n;i++){
        if(win[i]>0){
            for(int j=0;j<n;j++){
                if(b[i][j]){
                    if(win[j]==0||win[j]>win[i])win[j]=win[i];
                }
            }
        }
    }
    while(q--){
        ll x,y,d;
        cin>>x>>y>>d;
        x--;y--;
        
        if(b[x][y]){
            if((win[x]!=0)&&win[x]+dis[x][y]<=d){
                cout<<"TAK\n";
            }
            else if(dis[x][y]<=d&&dis[x][y]%2==d%2){
                cout<<"TAK\n";
            }
            else{
                cout<<"NIE\n";
            }
        }
        else{
            cout<<"NIE\n";
        }
    }
}

Compilation message (stderr)

mor.cpp: In function 'void bfs(ll)':
mor.cpp:19:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |         for(int j=0;j<v[x.first].size();j++){
      |                     ~^~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10