ACM-ICPC 2018 南京赛区网络预赛 B The writing on the wall（暴力）

ACM-ICPC 2018 南京赛区网络预赛 B The writing on the wall

这道题不想写了，直接看我队友的写的博客吧，网上其他博客其他方法我也看不懂。。
ACM-ICPC 2018 南京赛区网络预赛 B The writing on the wall

code：

#include 
using namespace std;
typedef long long ll;
int b[100010][110],up[110];
int main(){
    int T,cas = 0;
    scanf("%d",&T);
    while(T--){
        int n,m,k;
        scanf("%d%d%d",&n,&m,&k);
        for(int i = 0; i <= n; i++){
            for(int j = 0; j <= m; j++){
                b[i][j] = 0;
                up[j] = 0;
            }
        }
        for(int i = 0; i < k; i++){
            int x,y;
            scanf("%d%d",&x,&y);
            b[x][y] = 1;
        }
        ll ans = 0;
        for(int i = 1; i <= n; i++){
            for(int j = 1; j <= m; j++){
                if(b[i][j]) up[j] = i;
            }
            for(int j = 1; j <= m; j++){
                ll minn = 0x7f7f7f7f7f7f7f7f;
                for(int k = j; k > 0; k--){
                    minn = min(minn,(ll)(i-up[k]));
                    ans += minn;
                }
            }
        }
        printf("Case #%d: %lld\n",++cas,ans);
    }
    return 0;
}