Submission #37772

#	Time	Username	Problem	Language	Result	Execution time	Memory
37772		Just_Solve_The_Problem	Divide and conquer (IZhO14_divide)	C++11	17 / 100	69 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];

main () {
    int n; scanf ("%d", &n);
    ll ans = 0;
    for (int i = 1; i <= n; i++) {
        scanf ("%lld %lld %lld", x + i, g + i, d + i);
        ans = max(ans, g[i]);
    }
    for (int i = 1; i <= n; i++) {
        pg[i] = pg[i - 1] + g[i];
        pd[i] = pd[i - 1] + d[i];
    }
    int l = 1;
    int r = 1;
    do {
//        cout << l << ' ' << r << endl;
        if (pd[r] - pd[l - 1] >= x[r] - x[l]) {
            ans = max(ans, pg[r] - pg[l - 1]);
            if (l > 1 && pd[r] - pd[l - 2] >= x[r] - x[l - 1]) {
                l--;
            } else {
                if (r == n) {
                    break;
                }
                r++;
            }
        } else {
            l++;
        }
        r = min(r, n);
        l = min(l, r + 1);
    } while (r != n || l != n);
    cout << ans;
}

Compilation message (stderr)

divide.cpp:12:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main () {
       ^
divide.cpp: In function 'int main()':
divide.cpp:13:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     int n; scanf ("%d", &n);
                            ^
divide.cpp:16:54: 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: 17 / 17
• Subtask 2: 0 / 31
• Subtask 3: 0 / 52