Submission #860021

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Source Code Expand

#include <cstdio>
#include <algorithm>
#include <iostream>
#include <string>
#define MOD 1000000007
#define oo 987654321
#define INT long long
using namespace std;

int n, l, q, h[100010], dt[100010][20], a, b, now;

int main()
{
    scanf("%d", &n);
    for(int i = 1 ; i <= n ; i++ )
        scanf("%d", h+i);
    scanf("%d%d", &l, &q);
    for(int i = 1 ; i <= n ; i++ )
        dt[i][0] = (int)(upper_bound(h+1, h+n+1, h[i]+l)-h) - 1;
    for(int j = 1 ; j < 20 ; j++ )
        for(int i = 1 ; i <= n ; i++ )
            dt[i][j] = dt[dt[i][j-1]][j-1];
    while( q-- )
    {
        scanf("%d%d", &a, &b);
        if( a > b ) swap(a, b);
        int cnt = 0, d;
        for(int j = 19 ; j >= 0 ; j-- )
        {
            if( dt[a][j] < b )
            {
                cnt += ( 1<<j );
                a = dt[a][j];
                d = 0;
            }
            else d = j;
        }
        printf("%d\n", cnt + (1<<d));
    }
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:14:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
                    ^
./Main.cpp:16:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", h+i);
                         ^
./Main.cpp:17:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &l, &q);
                          ^
./Main.cpp:25:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &a, &b);
                              ^

Judge Result