oj.uz

답안 #245772

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
245772 2020-07-07T11:11:17 Z vanic Ili (COI17_ili) C++14
100 / 100
 562 ms 2688 KB 
#include <iostream>
#include <cstdio>
#include <math.h>
#include <algorithm>
#include <vector>
#include <set>
#include <stack>
#include <queue>
#include <string.h>
#include <bitset>

using namespace std;


const int maxn=2e4+5;

int n, m;
vector < int > ms[maxn];
vector < int > up[maxn];
vector < int > boje[maxn];
int kol[maxn];
int val[maxn];

int pretvori(string x){
	int br=0;
	for(int i=1; i<x.size(); i++){
		br*=10;
		br+=x[i]-'0';
	}
	return br;
}


void gore(int x){
	val[x]=1;
	for(int i=0; i<up[x].size(); i++){
		if(val[up[x][i]]==-1){
			gore(up[x][i]);
		}
	}
}

void dolje(int x){
	val[x]=0;
	for(int i=0; i<ms[x].size(); i++){
		if(val[ms[x][i]]==-1){
			dolje(ms[x][i]);
		}
	}
	for(int i=0; i<up[x].size(); i++){
		if(ms[up[x][i]].size()==1 && val[up[x][i]]==-1){
			dolje(up[x][i]);
		}
		else if(val[up[x][i]]==-1 && !val[ms[up[x][i]][0]] && !val[ms[up[x][i]][1]]){
			dolje(up[x][i]);
		}
	}
}

void probaj(int x){
	val[x]=1;
	if(ms[x].size()==1){
		if(val[ms[x][0]]==-1){
			gore(ms[x][0]);
			probaj(ms[x][0]);
		}
	}
	else if(ms[x].size()==2){
		if(!val[ms[x][0]] && val[ms[x][1]]==-1){
			gore(ms[x][1]);
			probaj(ms[x][1]);
		}
		else if(!val[ms[x][1]] && val[ms[x][0]]==-1){
			gore(ms[x][0]);
			probaj(ms[x][0]);
		}
	}
}

bitset < maxn > bio;

bool dfs(int x){
	if(val[x]==1){
		return 1;
	}
	bio[x]=1;
	for(int i=0; i<ms[x].size(); i++){
		if(val[ms[x][i]]==-1 && !bio[ms[x][i]]){
			if(dfs(ms[x][i])){
				return 1;
			}
		}
	}
	bool p;
	for(int i=0; i<up[x].size(); i++){
		if(bio[up[x][i]]){
			continue;
		}
		p=1;
		for(int j=0; j<ms[up[x][i]].size(); j++){
			if(!bio[ms[up[x][i]][j]] && val[ms[up[x][i]][j]]!=0){
				p=0;
			}
		}
		if(p){
			if(dfs(up[x][i])){
				return 1;
			}
		}
	}
	return 0;
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin >> n >> m;
	string s;
	cin >> s;
	string a, b;
	int br1, br2;
	memset(val, -1, sizeof(val));
	for(int i=0; i<m; i++){
		cin >> a >> b;
		br1=pretvori(a);
		br2=pretvori(b);
		br1--;
		br2--;
		if(a[0]=='c'){
			br1+=n;
		}
		if(b[0]=='c'){
			br2+=n;
		}
		if(br1!=br2){
			up[br1].push_back(i+n);
			up[br2].push_back(i+n);
			ms[i+n].push_back(br1);
			ms[i+n].push_back(br2);
		}
		else{
			up[br1].push_back(i+n);
			ms[i+n].push_back(br1);
		}
	}
	for(int i=0; i<m; i++){
		if(val[i+n]==-1){
			if(s[i]=='0'){
				dolje(i+n);
			}
			else if(s[i]=='1'){
				gore(i+n);
			}
		}
	}
	for(int i=0; i<m; i++){
		if(val[i+n]==1){
			probaj(i+n);
		}
	}
	for(int i=0; i<m; i++){
		if(val[i+n]==-1){
			if(dfs(i+n)){
				gore(i+n);
				probaj(i+n);
			}
			bio.reset();
		}
	}
//	cout << val[111] << " " << val[17] << " " << val[19] << endl;
	for(int i=0; i<m; i++){
/*		if(i==184){
			cout << endl;
			cout << val[i+n] << endl;
		}*/
		if(val[i+n]==-1){
			cout << '?';
		}
		else{
			cout << val[i+n];
		}
	}
	return 0;
}

Compilation message

ili.cpp: In function 'int pretvori(std::__cxx11::string)':
ili.cpp:26:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1; i<x.size(); i++){
               ~^~~~~~~~~
ili.cpp: In function 'void gore(int)':
ili.cpp:36:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<up[x].size(); i++){
               ~^~~~~~~~~~~~~
ili.cpp: In function 'void dolje(int)':
ili.cpp:45:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<ms[x].size(); i++){
               ~^~~~~~~~~~~~~
ili.cpp:50:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<up[x].size(); i++){
               ~^~~~~~~~~~~~~
ili.cpp: In function 'bool dfs(int)':
ili.cpp:87:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<ms[x].size(); i++){
               ~^~~~~~~~~~~~~
ili.cpp:95:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<up[x].size(); i++){
               ~^~~~~~~~~~~~~
ili.cpp:100:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0; j<ms[up[x][i]].size(); j++){
                ~^~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 1792 KB Output is correct
2 Correct 6 ms 1792 KB Output is correct
3 Correct 6 ms 1920 KB Output is correct
4 Correct 5 ms 1792 KB Output is correct
5 Correct 5 ms 1920 KB Output is correct
6 Correct 6 ms 1792 KB Output is correct
7 Correct 5 ms 1792 KB Output is correct

Subtask #2
42.0 / 42.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 1792 KB Output is correct
2 Correct 6 ms 1792 KB Output is correct
3 Correct 6 ms 1920 KB Output is correct
4 Correct 5 ms 1792 KB Output is correct
5 Correct 5 ms 1920 KB Output is correct
6 Correct 6 ms 1792 KB Output is correct
7 Correct 5 ms 1792 KB Output is correct
8 Correct 6 ms 1968 KB Output is correct
9 Correct 7 ms 1792 KB Output is correct
10 Correct 6 ms 1920 KB Output is correct
11 Correct 6 ms 1920 KB Output is correct
12 Correct 6 ms 1920 KB Output is correct
13 Correct 6 ms 1920 KB Output is correct
14 Correct 6 ms 1920 KB Output is correct

Subtask #3
51.0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 1792 KB Output is correct
2 Correct 6 ms 1792 KB Output is correct
3 Correct 6 ms 1920 KB Output is correct
4 Correct 5 ms 1792 KB Output is correct
5 Correct 5 ms 1920 KB Output is correct
6 Correct 6 ms 1792 KB Output is correct
7 Correct 5 ms 1792 KB Output is correct
8 Correct 6 ms 1968 KB Output is correct
9 Correct 7 ms 1792 KB Output is correct
10 Correct 6 ms 1920 KB Output is correct
11 Correct 6 ms 1920 KB Output is correct
12 Correct 6 ms 1920 KB Output is correct
13 Correct 6 ms 1920 KB Output is correct
14 Correct 6 ms 1920 KB Output is correct
15 Correct 9 ms 2304 KB Output is correct
16 Correct 12 ms 2432 KB Output is correct
17 Correct 11 ms 2432 KB Output is correct
18 Correct 17 ms 2560 KB Output is correct
19 Correct 10 ms 2432 KB Output is correct
20 Correct 13 ms 2688 KB Output is correct
21 Correct 13 ms 2688 KB Output is correct
22 Correct 10 ms 2688 KB Output is correct
23 Correct 10 ms 2688 KB Output is correct
24 Correct 10 ms 2688 KB Output is correct
25 Correct 397 ms 2432 KB Output is correct
26 Correct 390 ms 2432 KB Output is correct
27 Correct 485 ms 2552 KB Output is correct
28 Correct 464 ms 2552 KB Output is correct
29 Correct 369 ms 2424 KB Output is correct
30 Correct 382 ms 2552 KB Output is correct
31 Correct 562 ms 2552 KB Output is correct
32 Correct 551 ms 2528 KB Output is correct