题目信息：参考链接
#include<stdio.h>
#include<stdlib.h>
#include<string.h>//碰撞的小球 0 - L
void ball(){int n, L, t, i, x, y;int *sign;char *flag;scanf("%d %d %d", &n, &L, &t);flag = (char *)malloc(n);memset(flag, 0, n);sign = (int *)malloc(n * sizeof(int));for(i = 0; i < n; i++){scanf("%d", &sign[i]);}while(t){for(i = 0; i < n; i++){if(flag[i] == 0){//右移if(sign[i] == L){ //右端点flag[i] = 1;sign[i]--;}else{sign[i]++;}}else{//左移if(sign[i] == 0){ //左端点flag[i] = 0;sign[i]++;}else{sign[i]--;}}}//碰撞检测for(x = 0; x < n - 1; x++){for(y = x + 1; y < n; y++){if(sign[x] == sign[y]){if(flag[x] == 0){flag[x] = 1;flag[y] = 0;}else{flag[y] = 1;flag[x] = 0;}}}}t--;}for(i = 0; i < n; i++){printf("%d ", sign[i]);}}
int main(){
ball();
return 0;
}