Submission #857008

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Source Code Expand

#include<cstdio>
#include<cstring>
#include<cmath>
#include<set>
#include<map>
#include<queue>
#include<vector>
#include<algorithm>
#include<iostream>
#include<string>
#include<assert.h>
#include<sstream>
using namespace std;
#define pb push_back
#define mp make_pair
#define sz(x) ((int)(x).size())
#define rep(i,l,r) for(int i=(l);i<(r);++i)
#define setIO(x) freopen(x".in","r",stdin);freopen(x".out","w",stdout);
typedef long long ll;
typedef pair<int, int> pii;
const ll LINF = 1e18 + 7;
const int N = 1e5 + 7;
const int INF = 1e9 + 7;
const int MOD = 1e9 + 7;
const double EPS = 1e-8;
//-------------head-------------
int n, m, L, x[N], f[N][20];
int main() {
	scanf("%d", &n);
	rep(i, 1, n + 1)
		scanf("%d", &x[i]);
	scanf("%d", &L);
	for (int i = n, sum = 0, p = n; i > 0; --i) {
		while (sum > L) {
			sum -= x[p] - x[p - 1];
			--p;
		}
		f[i][0] = p, sum += x[i] - x[i - 1];
	}
	for (int j = 1; j < 20; ++j)
		for (int i = n; i >= 1; --i)
			f[i][j] = f[f[i][j - 1]][j - 1];
	scanf("%d", &m);
	rep(_m, 0, m)
	{
		int l, r, ans = 0;
		scanf("%d%d", &l, &r);
//		printf("l = %d, r = %d\n", l, r);
		if (l > r)
			swap(l, r);
		for (int i = 19; i >= 0; --i)
			if (f[l][i] < r) {
				ans += 1 << i, l = f[l][i];
//				printf("%d ", l);
			}
		++ans;
		printf("%d\n", ans);
	}
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:29:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^
./Main.cpp:31:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &x[i]);
                     ^
./Main.cpp:32:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &L);
                 ^
./Main.cpp:43:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &m);
                 ^
./Main.cpp:47:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &l, &r);
                        ^

Judge Result