Submission #376952

#	Time	Username	Problem	Language	Result	Execution time	Memory
376952		joelau	Bigger segments (IZhO19_segments)	C++14	100 / 100	81 ms	12272 KiB

segments

#include <bits/stdc++.h>
using namespace std;

int N,ans[500001];
long long A[500001], sz[500001];
deque<int> dq;

int main() {
    scanf("%d", &N);
    A[0] = 0;
    for (int i = 1; i <= N; ++i) {
        scanf("%lld", &A[i]);
        A[i] += A[i-1];
    }
    ans[0] = 0, sz[0] = 0;
    for (int i = 1; i <= N; ++i) {
        while (dq.size() > 1 && sz[dq[1]] + A[dq[1]] <= A[i]) dq.pop_front();
        if (!dq.empty() && sz[dq.front()] + A[dq.front()] <= A[i]) ans[i] = ans[dq.front()]+1, sz[i] = A[i] - A[dq.front()];
        else ans[i] = 1, sz[i] = A[i];
        while (!dq.empty() && sz[i] + A[i] <= sz[dq.back()] + A[dq.back()]) dq.pop_back();
        dq.push_back(i);
    }
    printf("%d", ans[N]);

    return 0;
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |     scanf("%d", &N);
      |     ~~~~~^~~~~~~~~~
segments.cpp:12:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   12 |         scanf("%lld", &A[i]);
      |         ~~~~~^~~~~~~~~~~~~~~

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