Submission #376287

#	Time	Username	Problem	Language	Result	Execution time	Memory
376287		Halogen	Bigger segments (IZhO19_segments)	C++14	0 / 100	1 ms	364 KiB

segments

#include <bits/stdc++.h>

using namespace std;

#define int long long

int N, presum[500005];

int check(int x) {
    int ans = 1, curseg = presum[x];
    while (x < N) {
        int nx = lower_bound(presum + 1, presum + N + 1, curseg + presum[x]) - presum;
        if (presum[nx] - presum[x] < curseg) return 0;
        curseg = presum[nx] - presum[x];
        ans++;
        x = nx;
        // printf("%lld\n", x);
    }
    return ans;
}

main() {
    scanf("%lld", &N);
    for (int i = 1; i <= N; i++) scanf("%lld", &presum[i]);
    for (int i = 2; i <= N; i++) presum[i] += presum[i - 1];

    int ans = 1;
    for (int x = 1; x < N; x++) {
        ans = max(ans, check(x));
        // printf("%lld\n", check(x));
    }

    printf("%lld\n", ans);
}

Compilation message (stderr)

segments.cpp:22:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   22 | main() {
      |      ^
segments.cpp: In function 'int main()':
segments.cpp:23:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |     scanf("%lld", &N);
      |     ~~~~~^~~~~~~~~~~~
segments.cpp:24:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   24 |     for (int i = 1; i <= N; i++) scanf("%lld", &presum[i]);
      |                                  ~~~~~^~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27