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- #include <bits/stdc++.h>
- #define MAXN 200010
- typedef long long ll;
- using namespace std;
- long long int V[MAXN], SV[MAXN];
- int main() {
- int n, q; scanf("%d %d", &n, &q);
- for(int i = 1; i <= n; i++){
- scanf("%lld", &V[i]);
- SV[i] = V[i] + SV[i-1];
- }
- while(q--){
- int a, b; scanf("%d %d", &a, &b);
- long long int soma = SV[b] - SV[a-1];
- printf("%lld\n", soma);
- }
- return 0;
- }
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