Submission #3374592

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Source Code Expand

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

void add(int *bit,int n,int index,int v){
  for(int i=index;i<=n;i+=i&-i) bit[i]+=v;
  return;
}

int sum(int *bit,int n,int index){
  int res=0;
  for(int i=index;i>0;i-=i&-i) res+=bit[i];
  return res;
}

void run(void){
  int n;
  scanf("%d",&n);
  int *s=(int *)malloc(sizeof(int)*n);
  int *t=(int *)malloc(sizeof(int)*n);
  int i;
  for(i=0;i<n;i++) scanf("%d%d",s+i,t+i);
  int *bit=(int *)calloc(2*n+1,sizeof(int));
  for(i=0;i<n;i++) add(bit,2*n,s[i],1);
  for(i=0;i<n;i++){
    int ans=sum(bit,2*n,t[i])-sum(bit,2*n,s[i]);
    printf("%d\n",ans);
  }
}

int main(void){
  run();
  return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘run’:
./Main.c:17:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&n);
   ^
./Main.c:21:20: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   for(i=0;i<n;i++) scanf("%d%d",s+i,t+i);
                    ^

Judge Result