Submission #1972659

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Source Code Expand

#include <cassert>
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
using namespace std;
#define rep(i,n) for(int i = 0 ; i < (int)(n) ; i++)
typedef long long ll;
void solve(long long N, long long H, vector<long long> a, vector<long long> b){
	priority_queue< pair<ll,int> > Q;
	for(int i = 0 ; i < a.size() ; i++){
		Q.push({b[i], i});
	}
	long long ans = 0;
	while(H > 0){
		auto w = Q.top(); Q.pop();
		if( w.second >= 0 ){
			H -= w.first;
			ans++;
			Q.push({a[w.second], -1});
		}else{
			ans += (H+w.first-1) / w.first;
			break;
		}
	}
	cout << ans << endl;
}

int main(){	
	long long N;
	long long H;
	scanf("%lld",&N);
	vector<long long> b(N-1+1);
	vector<long long> a(N-1+1);
	scanf("%lld",&H);
	for(int i = 0 ; i <= N-1 ; i++){
		scanf("%lld",&a[i]);
		scanf("%lld",&b[i]);
	}
	solve(N, H, a, b);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:102:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&N);
                  ^
./Main.cpp:105:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&H);
                  ^
./Main.cpp:107:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld",&a[i]);
                      ^
./Main.cpp:108:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld",&b[i]);
                      ^

Judge Result