Submission #1316658

#	Time	Username	Problem	Language	Result	Execution time	Memory
1316658		ezzzay	Triple Peaks (IOI25_triples)	C++17	11 / 100	42 ms	1948 KiB

triples

//#include "triples.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
long long count_triples(vector<int> H) {
    int n=H.size();
    ll cnt=0;
    for(int k=0;k<n;k++){
        int i=k-H[k];
        if(i<0)continue;
        int j=H[i]+i;
        int A=j;
        int pcnt=cnt;
        multiset<int>st={H[i],H[j],H[k]};
        if(st.find(j-i)!=st.end())st.erase(st.find(j-i));
        if(st.find(k-i)!=st.end())st.erase(st.find(k-i));
        if(st.find(k-j)!=st.end())st.erase(st.find(k-j));
        if(st.empty())cnt++;
        st.clear();        
        j=k-H[i];
        int B=j;
        st={H[i],H[j],H[k]};
        if(st.find(j-i)!=st.end())st.erase(st.find(j-i));
        if(st.find(k-i)!=st.end())st.erase(st.find(k-i));
        if(st.find(k-j)!=st.end())st.erase(st.find(k-j));
        if(st.empty())cnt++;    
        if(cnt-pcnt==2 and A==B)cnt--;
    }
    return cnt;
}

vector<int> construct_range(int M, int K) {
    
}

Compilation message (stderr)

triples.cpp: In function 'std::vector<int> construct_range(int, int)':
triples.cpp:34:1: warning: no return statement in function returning non-void [-Wreturn-type]
   34 | }
      | ^

• Subtask 0: 0 / 0
• Subtask 1: 0 / 8
• Subtask 2: 0 / 6
• Subtask 3: 0 / 10
• Subtask 4: 11 / 11
• Subtask 5: 0 / 16
• Subtask 6: 0 / 19
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 5
• Subtask 10: 0 / 5
• Subtask 11: 0 / 5
• Subtask 12: 0 / 5