CCF-小明上学(201812-1)-C语言(100分)

#include <stdio.h>

int main(){
    int r,y,g,n,i;
    int time=0,k,t;
    scanf("%d%d%d%d",&r,&y,&g,&n);
    for(i=0;i<n;i++){
        scanf("%d %d",&k,&t);
        switch(k){
            case 0:
            case 1:time+=t;
                break;
            case 2:time=time+t+r;
                break;
            default:
                break;
        }
    }
    printf("%d\n",time);
    return 0;
}