Submission #562597

#	Time	Username	Problem	Language	Result	Execution time	Memory
562597		Jesus	Ideal city (IOI12_city)	C++14	32 / 100	274 ms	5380 KiB

city

#include <bits/stdc++.h>

using namespace std;

int city[2002][2002];

bool revisado[2002][2002];

int visto[2002][2002];

int vacio=1;

long long int suma=0;

int lim,origen;

queue<pair<long long int,int>> cola;

int col[2002], fil[2002];

void dfs(int i,int j){
    cola.push({0,city[i][j]});

    while(cola.size()>0){
        pair<long long int,int> aux=cola.front();
        cola.pop();
        if(visto[fil[aux.second]][col[aux.second]]!=vacio){
            visto[fil[aux.second]][col[aux.second]]=vacio;
            if(revisado[min(aux.second,origen)][max(aux.second,origen)]==false){
               revisado[min(aux.second,origen)][max(aux.second,origen)]=true;
               suma+=(aux.first*-1);
               suma%=1000000000;
            }
            i=fil[aux.second-1];
            j=col[aux.second-1];
            if(i<lim&&city[i+1][j]>0) cola.push({aux.first-1,city[i+1][j]});
            if(i>1&&city[i-1][j]>0) cola.push({aux.first-1,city[i-1][j]});
            if(j<lim&&city[i][j+1]>0) cola.push({aux.first-1,city[i][j+1]});
            if(j>1&&city[i][j-1]>0) cola.push({aux.first-1,city[i][j-1]});
        }

    }
}


int DistanceSum(int N, int *X, int *Y) {
    lim=N;
    long long int total=0;
    for(int i=0;i<N;i++){
        fil[i]=X[i];
        col[i]=Y[i];
        city[X[i]][Y[i]]=i+1;
    }
    for(int i=0;i<N;i++){
        suma=0;
        origen=i+1;
        dfs(X[i],Y[i]);
        total+=suma;
        total%=1000000000;
        vacio++;
    }
  return total;
}

• Subtask 1: 11 / 11
• Subtask 2: 21 / 21
• Subtask 3: 0 / 23
• Subtask 4: 0 / 45