Submission #623671

#	Time	Username	Problem	Language	Result	Execution time	Memory
623671		inksamurai	Prosjecni (COCI16_prosjecni)	C++17	120 / 120	1 ms	384 KiB

prosjecni

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define _3SgiE60 ios::sync_with_stdio(0),cin.tie(0)
// e

const int _n=111;

signed main(){
_3SgiE60;
	int n;
	cin>>n;
	if(n==2){
		printf("-1\n");
		return 0;
	}
	int a[_n][_n],dro[_n],dco[_n];
	if(n%2==0){
		for(int i=1;i<n;i++){
			dro[i]=(i%2?1:-1)*(i+1)/2;
		}
		dro[n-1]+=1;
		dro[1]-=dro[n-1];
		int ad=dro[n-1]-dro[1]+1;
		for(int j=1;j<n;j++){
			dco[j]=dco[j-1]+ad;
		}
		int x=2*n+1;
		rep(j,n){
			dco[j]+=x;
		}
		while(1){
			int sun=0;
			rep(j,n){
				sun+=dco[j];
			}
			bool pok=0;
			rep(j,n){
				pok=pok or (dco[j]==sun/n);
			}
			if(pok) break;
			dco[n-1]+=n;
		}
		// rep(j,n){
		// 	printf("%d ",dco[j]);
		// }
		// puts("");
		rep(i,n){
			rep(j,n){
				a[i][j]=dco[j]+dro[i];
			}
		}
	}else{
		rep(i,n){
			rep(j,n){
				a[i][j]=i*n+j+1;
			}
		}
	}
	rep(i,n){
		rep(j,n){
			printf("%d ",a[i][j]);
		}
		puts("");
	}
}

Compilation message (stderr)

prosjecni.cpp: In function 'int main()':
prosjecni.cpp:22:11: warning: 'dro[<unknown>]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   22 |   dro[n-1]+=1;
      |   ~~~~~~~~^~~

• Subtask 1: 120 / 120