Submission #1232868

#	Time	Username	Problem	Language	Result	Execution time	Memory
1232868		m5588ohammed	Soccer Stadium (IOI23_soccer)	C++20	Compilation error	0 ms	0 KiB

soccer

#include "soccer.h"
#include <bits/stdc++.h>
using namespace std;
int arr[2001][2001],vis[2001][2001],n;
bool valid(int i,int j){
    if(i>=n||j>=n||i<0||j<0||arr[i][j]==1||vis[i][j]==1) return 0;
    return 1;
}
void dfs(int i,int j){
    vis[i][j]=1;
    if(valid(i+1,j)==1) dfs(i+1,j);
    if(valid(i-1,j)==1) dfs(i-1,j);
    if(valid(i,j+1)==1) dfs(i,j+1);
    if(valid(i,j-1)==1) dfs(i,j-1);
    return;
}
int biggest_stadium(int N, std::vector<std::vector<int>> F)
{
    n=N;
    int cnt=0,siz=0;
    vector <array<int,2>> v;
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++) arr[i][j]=F[i][j];
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            if(arr[i][j]==1)
                if(valid(i-1,j)+valid(i+1,j)==2||valid(i,j-1)+valid(i,j+1)==2) return -1;    
            }
        }
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            if(vis[i][j]==0){
                cnt++;
                dfs(i,j);
            }
            if(arr[i][j]==1) v.push_back({i,j});
            else siz++;
        }
    }
    if(cnt>1) return -1;
    for(auto [i1,j1]:v){
        for(auto [i2,j2]:v){
            if(arr[i1][j1]!=1||arr[i2][j1]!=1) return -1;
        }
    }
    return siz;
}

Compilation message (stderr)

soccer.cpp:32:5: error: expected unqualified-id before 'for'
   32 |     for(int i=0;i<n;i++){
      |     ^~~
soccer.cpp:32:17: error: 'i' does not name a type
   32 |     for(int i=0;i<n;i++){
      |                 ^
soccer.cpp:32:21: error: 'i' does not name a type
   32 |     for(int i=0;i<n;i++){
      |                     ^
soccer.cpp:42:5: error: expected unqualified-id before 'if'
   42 |     if(cnt>1) return -1;
      |     ^~
soccer.cpp:43:5: error: expected unqualified-id before 'for'
   43 |     for(auto [i1,j1]:v){
      |     ^~~
soccer.cpp:48:5: error: expected unqualified-id before 'return'
   48 |     return siz;
      |     ^~~~~~
soccer.cpp:49:1: error: expected declaration before '}' token
   49 | }
      | ^
soccer.cpp: In function 'int biggest_stadium(int, std::vector<std::vector<int> >)':
soccer.cpp:31:5: warning: control reaches end of non-void function [-Wreturn-type]
   31 |     }
      |     ^