Submission #42207812

---

Source Code Expand

#include<cstdio>
#include<cstring>
#define fep(i,x,y) for(int i=x;i<=y;i++)
#define feq(i,x,y) for(int i=y;i>=x;i--)
#define N 210
#define INF 999999999
using namespace std;
typedef long long LL;
inline int mymin(int x,int y){return x<y?x:y;}
inline int mymax(int x,int y){return x>y?x:y;}
int a[N][N];
int n,K,Q;
inline LL chu1(LL x){return (x-1)%n+1;}
inline int chu2(int x){return x>n+n?-1:x;}
int main(){
	scanf("%d%d",&n,&K);
	memset(a,20,sizeof(a));
	int nn=n+n;
	fep(i,1,n){
		fep(j,1,n){
			int x;scanf("%d",&x);
			if(x)a[i][j]=a[i+n][j]=a[i][j+n]=a[i+n][j+n]=x;
		}
	}
	fep(i,1,nn){
		fep(j,1,nn){
			fep(k,1,nn)a[j][k]=mymin(a[j][i]+a[i][k],a[j][k]);
		}
	}
	scanf("%d",&Q);
	fep(i,1,Q){
		LL x,y;scanf("%lld%lld",&x,&y);
		if(x%n==y%n){
			if(x==y)printf("0\n");
			else printf("%d\n",chu2(a[chu1(x)][chu1(x)+n]));
		}
		else printf("%d\n",chu2(a[chu1(x)][chu1(y)]));
	}
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:16:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   16 |  scanf("%d%d",&n,&K);
      |  ~~~~~^~~~~~~~~~~~~~
./Main.cpp:21:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   21 |    int x;scanf("%d",&x);
      |          ~~~~~^~~~~~~~~
./Main.cpp:30:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   30 |  scanf("%d",&Q);
      |  ~~~~~^~~~~~~~~
./Main.cpp:32:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   32 |   LL x,y;scanf("%lld%lld",&x,&y);
      |          ~~~~~^~~~~~~~~~~~~~~~~~

Judge Result