Submission #37795

#	Time	Username	Problem	Language	Result	Execution time	Memory
37795		Just_Solve_The_Problem	Divide and conquer (IZhO14_divide)	C++11	0 / 100	63 ms	5920 KiB

divide

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int N = (int)1e5 + 7;

ll x[N], g[N], d[N];
ll pg[N], pd[N];

bool check (int l, int r) {
    return x[r] - x[l] <= pd[r] - pd[l - 1];
}

main () {
    int n; scanf ("%d", &n);
    for (int i = 1; i <= n; i++) {
        scanf ("%lld %lld %lld", x + i, g + i, d + i);
    }
    for (int i = 1; i <= n; i++) {
        pg[i] = pg[i - 1] + g[i];
        pd[i] = pd[i - 1] + d[i];
    }
    ll ans = 0;
    for (int i = 1; i <= n; i++) {
        for (int j = i; j <= n; j++) {
            if (pg[n] - pg[i - 1] <= ans || x[n] - x[i] > pd[n] - pd[i - 1]) break;
            if (check(i, j)) {
                ans = max(ans, pg[j] - pg[i - 1]);
            }
        }
    }
    cout << ans;
}

Compilation message (stderr)

divide.cpp:16:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main () {
       ^
divide.cpp: In function 'int main()':
divide.cpp:17:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     int n; scanf ("%d", &n);
                            ^
divide.cpp:19:54: 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, d + i);
                                                      ^

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