Submission #2075215

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Source Code Expand

#include<stdio.h>
#include<vector>
#include<algorithm>
using namespace std;
typedef long long ll;
typedef pair<ll, ll>pii;
int main()
{
	int num;
	ll gen;
	scanf("%d%lld", &num, &gen);
	vector<pii>v;
	for (int i = 0; i < num; i++)
	{
		int za, zb;
		scanf("%d%d", &za, &zb);
		v.push_back(make_pair(zb, 1));
		v.push_back(make_pair(za, 0));
	}
	sort(v.begin(), v.end());
	reverse(v.begin(), v.end());
	ll ans = 0;
	for (int i = 0;; i++)
	{
		if (v[i].second == 0)
		{
			printf("%lld\n", ans + (gen + v[i].first - 1) / v[i].first);
			break;
		}
		else
		{
			ans++;
			gen -= v[i].first;
			if (gen <= 0)
			{
				printf("%lld\n", ans);
				break;
			}
		}
	}
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:11:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%lld", &num, &gen);
                             ^
./Main.cpp:16:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &za, &zb);
                          ^

Judge Result