Submission #1142957

#	Time	Username	Problem	Language	Result	Execution time	Memory
1142957		ag_1204	Mosaic (IOI24_mosaic)	C++20	Compilation error	0 ms	0 KiB

mosaic

#include<bits/stdc++.h>
using namespace std;
#define int long long int
#define pii pair<int,int>
#define vi vector<int>
#define vvi vector<vi>
#define si set<int>
#define pb push_back

void solve() {
  int n; cin>>n;
  int grid[n+1][n+1],cnt[n+1][n+1];
  memset(cnt,0,sizeof(cnt));
  for (int i=1;i<=n;i++) {
    int x; cin>>x; grid[1][i]=x;
    cnt[1][i]=cnt[1][i-1]+x;
  }
  for (int i=1;i<=n;i++) {
    int y; cin>>y; grid[i][1]=y;
    cnt[i][1]=cnt[i-1][1]+y;
  }
  for (int i=2;i<=n;i++) {
    for (int j=2;j<=n;j++) {
      if (grid[i][j-1]+grid[i-1][j]>0) grid[i][j]=0;
      else grid[i][j]=1;
      cnt[i][j]=cnt[i-1][j]+cnt[i][j-1]-cnt[i-1][j-1]+grid[i][j];
    }
  }
  /*
  for (int i=1;i<=n;i++) {
    for (int j=1;j<=n;j++) cout<<grid[i][j]<<" ";
    cout<<endl;
  }
  cout<<endl;
  for (int i=1;i<=n;i++) {
    for (int j=1;j<=n;j++) cout<<cnt[i][j]<<" ";
    cout<<endl;
  }
  */
  int q; cin>>q;
  while(q--) {
    int a,b,c,d; cin>>a>>b>>c>>d; b++; d++;
    cout<<cnt[b][d]+cnt[a][c]-cnt[a][d]-cnt[b][c]<<endl;
  }
  return;
}

int32_t main() {
	ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
	int tt=1; //cin>>tt;
	while(tt--) {
	    solve();
	}
	return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cc3FrAMu.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccxEPIEp.o:mosaic.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cc3FrAMu.o: in function `main':
grader.cpp:(.text.startup+0x43d): undefined reference to `mosaic(std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status