Submission #244234

#	Time	Username	Problem	Language	Result	Execution time	Memory
244234		ainta	Bigger segments (IZhO19_segments)	C++17	100 / 100	135 ms	15096 KiB

segments

#include<cstdio>
#include<algorithm>
using namespace std;
long long S[501000];
int w[501000], n, D[501000], P[501000], res;
int main(){
    int i;
    scanf("%d",&n);
    for(i=1;i<=n;i++){
        scanf("%d",&w[i]);
        S[i]=S[i-1]+w[i];
    }
    for(i=1;i<=n;i++){
        P[i]=max(P[i],P[i-1]);
        D[i]=D[P[i]]+1;
        long long s = S[i]+S[i]-S[P[i]];
        int pv = lower_bound(S+1,S+n+1,s)-S;
        P[pv]=max(P[pv],i);
    }
    printf("%d\n",D[n]);
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
segments.cpp:10:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&w[i]);
         ~~~~~^~~~~~~~~~~~

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