Submission #1149776

#	Time	Username	Problem	Language	Result	Execution time	Memory
1149776		notasingle...	Split the sequence (APIO14_sequence)	C++20	Compilation error	0 ms	0 KiB

sequence

#include<bits/stdc++.h>
using namespace std;
long long n, k, p;
long long lst[200005], slot[200005][201], trace[200005][201];
deque<pair<long long, long long>> D;
inline f(pair<long long, long long> P, long long t){
    return P.first + (lst[t] - lst[P.second])*(lst[t] - lst[P.second]);
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n >> k;
    p = n;
    for(long long i = 1; i <= n; ++i){
        cin >> lst[i];
        lst[i] += lst[i-1];
        slot[i][0] = lst[i] * lst[i];
    }
    for(long long _ = 1; _ <= k; ++_){
        D.push_front({slot[_][_-1], _});
        for(long long i = _ + 1; i <= n; ++i){
            while(D.size() > 1 && f(D.front(), i) > f(D[1], i)) D.pop_front();
            D.push_back({slot[i][_-1], i});
            slot[i][_] = f(D.front(), i);
            trace[i][_] = D.front().second;
        }
        while(!D.empty()) D.pop_front();
    }
    cout << (lst[n] * lst[n] - slot[n][k]) / 2 << '\n';
    while(k--){
        p = trace[p][k+1];
        cout << p << ' ';
    }
}

Compilation message (stderr)

sequence.cpp:6:8: error: ISO C++ forbids declaration of 'f' with no type [-fpermissive]
    6 | inline f(pair<long long, long long> P, long long t){
      |        ^