38 lines
619 B
C++
38 lines
619 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int main(){
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ios::sync_with_stdio(0);
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cin.tie(0);
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int n, q;
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cin >> n >> q;
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vector<int> p(n);
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for(int i = 0; i < n; ++i){
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cin >> p[i];
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}
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sort(p.begin(), p.end());
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vector<uint64_t> bottom_sums(n+1);
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uint64_t sum = 0;
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for(int i = 0; i <= n; ++i){
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bottom_sums[i] = sum;
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sum += p[i];
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}
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for(int i = 0; i < q; ++i){
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int x, y;
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cin >> x >> y;
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uint64_t ans = bottom_sums[n - x + y] - bottom_sums[n - x];
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cout << ans << '\n';
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}
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cout << flush;
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return 0;
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} |