Submission #856118

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Source Code Expand

#include<cstdio>
#include<algorithm>
using namespace std;
const int MAX = 100000 + 10;

int rec[MAX];
int tar[MAX];

int go(int x, int y){
  int ret = 0;
  while(x < y){
    x = tar[x];
    ret ++;
  }
  return ret;
}

int main(){
  int n, l;
  scanf("%d", &n);
  
  for(int i = 0 ; i < n ; i++){
    scanf("%d", &rec[i]);
  }

  scanf("%d", &l);
  int ls = 0;
  for(int i = 1 ; i < n ; i++){
    while (rec[i] - rec[ls] > l) {
      tar[ls] = i-1;
      ls++;
    }
  }
  for(int i = ls ; i < n ; i++){
    tar[i] = n;
  }
  
  int q;
  scanf("%d", &q);
  while(q--){
    int p, s;
    scanf("%d %d", &p, &s);
    p--, s--;
    if(p > s) swap(p, s);
    printf("%d\n", go(p,s));
  }

  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:20:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &n);
                  ^
./Main.cpp:23:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &rec[i]);
                         ^
./Main.cpp:26:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &l);
                  ^
./Main.cpp:39:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &q);
                  ^
./Main.cpp:42:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &p, &s);
                           ^

Judge Result