Submission #1040806

#	Time	Username	Problem	Language	Result	Execution time	Memory
1040806		n3rm1n	Toll (BOI17_toll)	C++17	7 / 100	12 ms	3672 KiB

toll

#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
typedef long long ll;
const ll MAXN = 5e4 + 10;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}

struct querie
{
    ll ql, qr, index;
    querie(){};
    querie(ll _ql, ll _qr, ll _index)
    {
        ql = _ql;
        qr = _qr;
        index = _index;
    }
};
ll k, n, m, q;
vector < pair < ll, ll > > g[MAXN];


int a[MAXN], is[MAXN];
ll prefa[MAXN], cnt[MAXN];
void read()
{
    cin >> k >> n >> m >> q;
    ll from, to, cost;
    for (ll i = 1; i <= m; ++ i)
    {
        cin >> from >> to >> cost;
        from ++;
        to ++;
        is[from] = 1;
        a[from] = cost;
    }
    for (int i = 1; i <= n; ++ i)
    {
        prefa[i] = prefa[i-1] + a[i];
        cnt[i] = cnt[i-1] + is[i];
    }
    while(q --)
    {
        int ql, qr;
        cin >> ql >> qr;
        ql ++;
        qr ++;
        int curr_cnt = cnt[qr-1] - cnt[ql-1];
        if(curr_cnt != qr - ql)cout << -1 << endl;
        else cout << prefa[qr-1] - prefa[ql - 1] << endl;
    }
}


void queries()
{
    ll ql, qr;
    for (ll i = 1; i <= q; ++ i)
    {
        cin >> ql >> qr;

    }

}
int main()
{
    speed();

    read();
   // queries();
    return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 0 / 10
• Subtask 3: 0 / 8
• Subtask 4: 0 / 31
• Subtask 5: 0 / 44