OJ-Problems-Source/HDOJ/4536_autoAC.cpp

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#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
using namespace std;
const int maxn = 20;
int p[maxn], nervous[maxn], n, m, k, max_cnt;
int att[110][3];
void dfs(int cn) {
if(max_cnt >= k) return ;
if(cn >= k) {
max_cnt = k; return ;
}
int a[3], bak[3];
for(int v=0; v<3; v++) {
a[0] = att[cn][v];
a[1] = att[cn][(v+1)%3];
a[2] = att[cn][(v+2)%3];
bak[0] = nervous[a[0]];
bak[1] = nervous[a[1]];
bak[2] = nervous[a[2]];
nervous[a[0]] -= 2;
if(nervous[a[0]] < 1) nervous[a[0]] = 1;
nervous[a[1]] += 2;
nervous[a[2]] += 2;
for(int i=0; i<n; i++) {
if(p[i] == p[a[1]] && i != a[1]) nervous[i]++;
if(p[i] == p[a[2]] && i != a[2]) nervous[i]++;
}
int flag = true;
for(int i=0; i<n; i++) {
if(nervous[i] > 5) {
max_cnt = max(max_cnt, cn);
flag = false;
}
}
if(flag) dfs(cn+1);
for(int i=0; i<n; i++) {
if(p[i] == p[a[1]] && i != a[1]) nervous[i]--;
if(p[i] == p[a[2]] && i != a[2]) nervous[i]--;
}
nervous[a[0]] = bak[0];
nervous[a[1]] = bak[1];
nervous[a[2]] = bak[2];
}
}
int main(){
int T;
scanf("%d", &T);
for(int kase=1; kase<=T; kase++) {
scanf("%d%d%d", &n, &m, &k);
for(int i=0; i<n; i++) {
scanf("%d", &p[i]);
}
for(int i=0; i<n; i++) {
scanf("%d", &nervous[i]);
}
for(int i=0; i<k; i++) {
scanf("%d %d %d", &att[i][0], &att[i][1], &att[i][2]);
}
max_cnt = 0;
printf("Case #%d: ", kase);
dfs(0);
printf("%d\n", max_cnt);
}
return 0;
}