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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#94002#5255. Greedy DrawersjakerWA 2ms3584kbC++142.7kb2023-04-04 19:39:232023-04-04 19:39:24

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-04-04 19:39:24]
  • 评测
  • 测评结果:WA
  • 用时:2ms
  • 内存:3584kb
  • [2023-04-04 19:39:23]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define rep(i,j,k) for(int i = j;i <= k;++i)
#define repp(i,j,k) for(int i = j;i >= k;--i)
#define rept(i,x) for(int i = linkk[x];i;i = e[i].n)
#define ll long long
#define pb push_back
#define mp make_pair
#define fr first
#define se second
#define P pair<int,int>
int rd() {
	int x; scanf("%d",&x);
	return x;
}
const ll INF = 1e17;
int T,N,C;
int n,m,st;
int ST,ED;
int cnt[1050];
bool vivad[1050];
char s1[20],s2[20];

int linkk[1050] , dep[1050] , t;
struct node{int n,v,y;}e[1010000];
// st : 1<<N   end : (1<<N)+1
void insert(int x,int y) {
	e[++t].n = linkk[x]; e[t].y = y; e[t].v = 1; linkk[x] = t;
	e[++t].n = linkk[y]; e[t].y = x; e[t].v = 0; linkk[y] = t;
}
void build() {
	rep(i,0,n-2) {
		if( ! (cnt[i] & 1) ) insert( ST , i ); // ou
		else insert( i , ED );
		rep(j,0,N-1)
			if(  (cnt[( i ^ (1<<j) )]&1) > (cnt[i]&1) ) insert( i , i ^ (1<<j)  );
	}
}
void reset() {
	rep(i,0,n) vivad[i] = false;
	t = 1; rep(i,0,n) linkk[i] = 0 , dep[i] = 0;
}
void init() {
	N = rd(); C = rd();
	n = (1<<N)+1;
	ST = 1<<N; ED = n;
	reset();
	scanf("%s%s",s1+1,s2+1);
	st = 0;
	rep(i,1,N) if(s1[i] == s2[i]) st += (1<<(i-1));
	rep(i,1,C) {
		int res = 0;
		scanf("%s",s1+1);
		rep(i,1,n) if(s1[i] == '=') res += (1<<(i-1));
		vivad[res] = true;
	}
	build();
}
queue<int>q;
bool bfs() {
	rep(i,0,n) dep[i] = -1; dep[ST] = 0;
	q.push(ST);
	while(!q.empty()) {
		int x = q.front(); q.pop();
		rept(i,x) {
			int y = e[i].y;
			if( !vivad[y] && dep[y] == -1 && e[i].v > 0 )
				dep[y] = dep[x]+1 , q.push(y);
		}
	}
	return dep[ED] != -1;
}
void output() {
	rep(x,0,n) {
		printf("#%d\n",x);
		rept(i,x) printf("*%d %d\n",e[i].y,e[i].v);
		printf("\n");
	}
}
ll dfs(int x,ll lazy) {
	if(x == ED) return lazy;
	if(vivad[x]) return 0;
	ll nowlazy = 0 , d = 0;
	rept(i,x) {
		int y = e[i].y;
		if( !vivad[y] && dep[y] == dep[x]+1 && e[i].v > 0 ) 
			if( d = dfs( y  , min( 1ll*e[i].v , lazy - nowlazy ) ) ) {
				e[i].v -= d;
				e[i^1].v += d;
				nowlazy += d;
			}
	}
	if(nowlazy == 0) dep[x] = -1;
	return nowlazy;
}
void work() {
	if(vivad[st]) {
		printf("Bob\n");
		return;
	}

	ll ans1 = 0 , ans2 = 0;
	while(bfs()) {
		ll d;
		while(d=dfs(ST,INF)) ans1 += d;
	}
	t = 1; rep(i,0,n) linkk[i] = 0 , dep[i] = 0;
	vivad[st] = true;
	build();

	while(bfs()) {
		ll d;
		while(d=dfs(ST,INF)) ans2 += d;
	}
	if(ans1 != ans2) printf("Alice\n");
	else printf("Bob\n");
	//printf("**%d\n",st);
	//printf("#%d %d\n",ans1,ans2);
}
int main() {
	freopen("1.in","r",stdin);
	rep(i,0,1024) {
		int x = i;
		while(x>0) cnt[i] += (x&1) , x >>= 1;
	}
	T = rd();
	while(T--) {
		init();
		work();
	}
	return 0;
}

Details

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Test #1:

score: 0
Wrong Answer
time: 2ms
memory: 3584kb

input:

150

output:

Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
Bob
...

result:

wrong output format Expected integer, but "Bob" found