24 lines
429 B
C
24 lines
429 B
C
#include <stdio.h>
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#include <stdlib.h>
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int main() {
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int N, M;
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scanf("%d %d",&N, &M);
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int* accSum = (int*)malloc(sizeof(int)*(N+1));
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accSum[0] = 0;
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for(int i=1; i<=N; i++){
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int n;
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scanf("%d",&n);
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accSum[i] += accSum[i-1] + n;
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}
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while(M--){
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int a, b;
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scanf("%d %d",&a, &b);
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printf("%d\n",accSum[b]-accSum[a-1]);
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}
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free(accSum);
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return 0;
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} |