#include <bits/stdc++.h>
using namespace std;
bool limites(int N, int i, int j){
return i>=0&&i<N&&j>=0&&j<N;
}
bool comprobar(int N, vector<vector<int>> F){
for(int i=0;i<N;i++){
for(int j=0;j<N;j++){
if(F[i][j]==1||F[i][j]==0){
continue;
}
priority_queue<tuple<int,int,int>,vector<tuple<int,int,int>>,greater<tuple<int,int,int>>>cola;
int dx[]={1,0,-1,0};
int dy[]={0,1,0,-1};
vector<vector<int>>dist(N,vector<int>(N,INT_MAX));
dist[i][j]=0;
cola.push({0,i,j});
while(!cola.empty()){
auto[d,x,y]=cola.top();
cola.pop();
for(int dir=0;dir<4;dir++){
int posi=x+dx[dir];
int posj=y+dy[dir];
while(true){
if(!limites(N,posi,posj)||F[posi][posj]==1||F[posi][posj]==0)break;
if((d+1)<dist[posi][posj]){
dist[posi][posj]=d+1;
cola.push({dist[posi][posj],posi,posj});
}
posi+=dx[dir];
posj+=dy[dir];
}
}
}
for(int x=0;x<N;x++){
for(int y=0;y<N;y++){
if(F[x][y]==2&&(dist[x][y]>=3||dist[x][y]==-1)){
return false;
}
}
}
}
}
return true;
}
int biggest_stadium(int N, vector<vector<int>>& F) {
int best = 0;
for (int fila = 0; fila < N; fila++) {
vector<pair<int, int>> almacen; // Almacena los rangos de columnas válidas
for (int columna = 0; columna < N; columna++) {
if (F[fila][columna] == 0) {
int ini = columna;
while (columna < N && F[fila][columna] == 0) columna++;
almacen.push_back({ini, columna - 1});
}
}
for (int columna = 0; columna < almacen.size(); columna++) {
int suma = almacen[columna].second - almacen[columna].first + 1;
vector<vector<int>> grid(N, vector<int>(N, 0));
int cnt = 0;
int fil = fila;
while (fil >= 0 && F[fil][almacen[columna].first] == 0 && F[fil][almacen[columna].second] == 0) {
for (int y = almacen[cnt].first; y <= almacen[cnt].second; y++) {
grid[fil][y] = 2;
}
fil--;
cnt++;
}
cnt = 0;
fil = fila;
while (fil < N && F[fil][almacen[columna].first] == 0 && F[fil][almacen[columna].second] == 0) {
for (int y = almacen[cnt].first; y <= almacen[cnt].second; y++) {
grid[fil][y] = 2;
}
fil++;
cnt++;
}
if (comprobar(N, grid)) {
best = max(suma, best);
}
}
}
return best;
}
Compilation message
soccer.cpp: In function 'int biggest_stadium(int, std::vector<std::vector<int> >&)':
soccer.cpp:58:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
58 | for (int columna = 0; columna < almacen.size(); columna++) {
| ~~~~~~~~^~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccuEgq5m.o: in function `main':
grader.cpp:(.text.startup+0x4ac): undefined reference to `biggest_stadium(int, std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >)'
collect2: error: ld returned 1 exit status
