Submission #1948061

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Source Code Expand

#include <stdio.h>
#include <stdlib.h>

/* ソート関数 */
int int_sort( const void * a , const void * b ) {
  /* 引数はvoid*型と規定されているのでint型にcastする */
  if( *( int * )a < *( int * )b ) {
    return 1;
  }
  else
  if( *( int * )a == *( int * )b ) {
    return 0;
  }
  return -1;
}



int main(void){
    int N,H;
    scanf("%d %d",&N,&H);
    int a[N],b[N];
    int maxa=0;
    for(int i=0;i<N;i++){
        scanf("%d %d",&a[i],&b[i]);
        if(maxa<a[i])maxa=a[i];
    }
      qsort(( void * )b , N , sizeof( b[0] ), int_sort );
    int ans=0;
    for(int i=0;i<N;i++){
        if(maxa>b[i])break;
        H-=b[i];
        ans++;
        if(H<=0){
            printf("%d",ans);
            return 0;
        }
    }
    ans+=(H+maxa-1)/maxa;
    printf("%d",ans);
    return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:21:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&N,&H);
     ^
./Main.c:25:9: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d",&a[i],&b[i]);
         ^

Judge Result