题解 | #牛牛的平面向量#

#include <stdio.h>

typedef struct vec {
    int x, y;
}vec_t;


int main() {
    int n;
    while (scanf("%d", &n) != EOF) { // 注意 while 处理多个 case
        // 64 位输出请用 printf("%lld") to 
        int x,y;
        vec_t vecs[n];
        for (int i = 0; i < n; i++) {
            scanf("%d %d", &vecs[i].x, &vecs[i].y);
        }
        for (int i = 1; i < n; i++) {
            vecs[0].x += vecs[i].x;
            vecs[0].y += vecs[i].y;
        }
        printf("%d %d", vecs[0].x, vecs[0].y);
    }
    return 0;
}