Submission #166389

#	Time	Username	Problem	Language	Result	Execution time	Memory
166389		abil	Divide and conquer (IZhO14_divide)	C++14	48 / 100	1067 ms	3180 KiB

divide

#include <bits/stdc++.h>
 
#define fr first
#define sc second
#define pb push_back
#define mk make_pair
#define all(s) s.begin(),s.end()
#define int long long
 
using namespace std;
 
const int N = (1e6 + 12);
const int mod = (1e9 + 7);
const int INF = (1e15 + 9);
 
int x[N], g[N], c[N], pr[N], prg[N], mx[N];
vector<pair<int,int > > vec;
main()
{
	int n;
	scanf("%lld", &n);
	for(int i = 1;i <= n; i++){
		scanf("%lld%lld%lld", &x[i], &g[i], &c[i]);
		pr[i] = pr[i - 1] + c[i];
		vec.pb({x[i] - pr[i], i});
		prg[i] = prg[i - 1] + g[i];
	}
	sort(all(vec));
	int ans = 0;
	for(int i = 1;i <= n; i++){
		int p = i;
		for(int j = 0;j < vec.size(); j++){
			if(vec[j].fr <= x[i] - pr[i - 1]){
				p = max(p, vec[j].sc);
			}
		}
		ans = max(ans, prg[p] - prg[i - 1]);
	}
	cout << ans;
}

Compilation message (stderr)

divide.cpp:18:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
divide.cpp: In function 'int main()':
divide.cpp:32:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j = 0;j < vec.size(); j++){
                 ~~^~~~~~~~~~~~
divide.cpp:21:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld", &n);
  ~~~~~^~~~~~~~~~~~
divide.cpp:23:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld%lld", &x[i], &g[i], &c[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 31 / 31
• Subtask 3: 0 / 52