#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
#define all(a) a.begin(), a.end()
main(){
ios::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
// ifstream cin("divide.in");
// ofstream cout("divide.out");
int n; cin >> n;
int x[n], g[n], d[n];
for(int i = 0;i < n; i++){
cin >> x[i] >> g[i] >> d[i];
}
int gold[n], energy[n], Min[n]; gold[0] = g[0], energy[0] = d[0], Min[0] = -x[0];
for(int i = 1;i < n; i++){
gold[i] = gold[i-1] + g[i];
energy[i] = energy[i-1]+d[i];
Min[i] = min(Min[i-1], energy[i-1]-x[i]);
}
int answer = 0;
function<int(int, int)> check=[&](int i, int j){
if(i > j) swap(i, j);
int s_g = gold[j] - (i > 0 ? gold[i-1] : 0);
int s_e = energy[j] - (i > 0 ? energy[i-1] : 0);
if(s_e >= x[j]-x[i]){
answer = max(answer, s_g);
return 1;
}
// energy[j] - energy[i-1] >= x[j] - x[i] = true
// energy[j] >= x[j]-x[i] + energy[i-1] = true;
// energy[j] - x[j] >= -x[i]+energy[i-1]
// energy[j] - x[j] >= energy[i-1]-x[i];
// energy[j]-x[j] + x[i] >= energy[i-1]
return 0;
};
for(int j = n-1; j >= 0; j--){
answer = max(answer, g[j]);
int l = 0, r = j, cnt = 0;
if(check(0,j)) continue;
while(l + 1 < r){
if(cnt > 30) break;
cnt++;
int mid = (l + r)>>1;
if(energy[j]-x[j] >= Min[mid]){
r = mid;
}else l = mid;
}
}
cout << answer;
return 0;
}
Compilation message
divide.cpp:11:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
11 | main(){
| ^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
320 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
320 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
320 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
