11441번 합 구하기

https://www.acmicpc.net/problem/11441

Prefix Sum : https://hsdevelopment.tistory.com/323

#include <iostream>
#include <deque>
#include <list>
#include <queue>
#include <stack>
#include <cstdio>
#include <vector>
#include <cstring>
#include <string>
#include <math.h>
#include <algorithm>
#include <map>
#include <set>
#include <functional>
#include <unordered_map>  
#include <unordered_set>  
#include <tuple>
#include <sstream>
 
#pragma warning(disable:4996)  
#pragma comment(linker, "/STACK:336777216")
 
using namespace std;
 
int N = 0;
 
int sum[100100] = { 0, };
 
int main(void)
{
    int A = 0, s = 0, M = 0, start = 0, end = 0;
 
    bool first = true;
 
    scanf("%d", &N);
 
    for (int i = 1; i <= N; i++)
    {
        scanf("%d", &A);
 
        sum[i] += sum[i - 1] + A;    
    }
 
    scanf("%d", &M);
 
    for (int i = 0; i < M; i++)
    {
        scanf("%d %d", &start, &end);
 
        printf("%d\n", sum[end] - sum[start - 1]);
    }
 
    return 0;
}