#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("fast-math")
//#pragma GCC optimize("no-stack-protector")
#define F first
#define S second
#define sz(x) int(x.size())
#define pb push_back
#define pf push_front
#define N 100010
#define M ll(1e9 + 7)
#define inf 1e9 + 1e9
using namespace std;
//using namespace __gnu_pbds;
typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef short int si;
typedef array <ll, 3> a3;
typedef array <ll, 4> a4;
//typedef tree <int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
bool mk0[N], mk1[N], mk[N], mkr[N], found, mark[N];
set <int> se;
vector <int> g[N], vr[N];
vector <pair <int, int> > path[N];
string s1[N], s2[N];
int convert(string s)
{
int t = 1, l = 0;
for (int j = 1; j < sz(s); j++)
{
l += t * (s[j] - '0');
t *= 10;
}
return l;
}
string c;
void dfs(int v, bool f)
{
if (mk[v]) return;
mk[v] = 1;
for (auto i : (f ? vr[v] : g[v]))
{
bool f1 = 0, f2 = 0;
int l = convert(s1[i]), r = convert(s2[i]);
if (s1[i][0] == 'c') f1 = 1;
if (s2[i][0] == 'c') f2 = 1;
if (c[i] == '?')
{
if ((!f1 && mk1[l]) || (!f2 && mk1[r]) || (f1 && c[l - 1] == '1') || (f2 && c[r - 1] == '1')) {c[i] = '1'; dfs(i, 1);}
else
if (((!f1 && mk0[l]) || (f1 && c[l - 1] == '0')) && ((!f2 && mk0[r]) || (f2 && c[r - 1] == '0'))) {c[i] = '0'; dfs(i, 1);}
}
else
{
if ((!f1 && mk0[l]) || (f1 && c[l - 1] == '0'))
{
if (f2) {c[r - 1] = '1'; dfs(r - 1, 1); continue;}
mk0[r] = 0;
mk1[r] = 1;
dfs(r, 0);
}
else if ((!f2 && mk0[r]) || (f2 && c[r - 1] == '0'))
{
if (f1) {c[l - 1] = '1'; dfs(l - 1, 1); continue;}
mk0[l] = 0;
mk1[l] = 1;
dfs(l, 0);
}
}
}
}
void go(int v)
{
if (mark[v]) return;
mark[v] = 1;
if (found) return;
for (auto it : path[v])
{
if (found) return;
if (it.S == 0)
{
for (auto x : g[it.F])
{
if (found) return;
if (se.find(x) != se.end()) {found = 1; return;}
se.insert(x);
}
}
else
{
// for (auto x : vr[it.F])
// {
// if (found) return;
//
// if (se.find(x) != se.end()) {found = 1; return;}
//
// se.insert(x);
// }
// go(it.F);
}
}
}
int main()
{
//freopen("input.txt", "r", stdin); freopen("output4.txt", "w", stdout);
ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int n, m;
cin >> n >> m;
cin >> c;
for (int i = 0; i < m; i++)
{
cin >> s1[i] >> s2[i];
bool f1 = 0, f2 = 0;
int l = convert(s1[i]), r = convert(s2[i]);
if (s1[i][0] == 'c') f1 = 1;
if (s2[i][0] == 'c') f2 = 1;
path[i].pb({l, f1});
path[i].pb({r, f2});
int v1 = 0, v2 = 0;
if (c[i] == '?')
{
if ((!f1 && mk1[l]) || (!f2 && mk1[r]) || (f1 && c[l - 1] == '1') || (f2 && c[r - 1] == '1')) c[i] = '1';
else
if (((!f1 && mk0[l]) || (f1 && c[l - 1] == '0')) && ((!f2 && mk0[r]) || (f2 && c[r - 1] == '0'))) c[i] = '0';
else
{
if (f1 || f2)
{
se.clear();
found = 0;
go(i);
if (found) c[i] = '1';
}
if (f1) vr[l - 1].pb(i);
else g[l].pb(i);
if (f2) vr[r - 1].pb(i);
else g[r].pb(i);
}
}
else
{
if (c[i] == '0')
{
if (!f1)
{
mk1[l] = 0;
mk0[l] = 1;
dfs(l, 0);
} else {c[l - 1] = 0; dfs(l - 1, 1);}
if (!f2)
{
mk1[r] = 0;
mk0[r] = 1;
dfs(r, 0);
} else {c[r - 1] = 0; dfs(r - 1, 1);}
}
else
{
if ((!f1 && mk0[l]) || (f1 && c[l - 1] == '0'))
{
if (f2) {c[r - 1] = '1'; dfs(r - 1, 1); continue;}
mk0[r] = 0;
mk1[r] = 1;
dfs(r, 0);
}
else if ((!f2 && mk0[r]) || (f2 && c[r - 1] == '0'))
{
if (f1) {c[l - 1] = '1'; dfs(l - 1, 1); continue;}
mk0[l] = 0;
mk1[l] = 1;
dfs(l, 0);
}
else
{
if (f1) vr[l - 1].pb(i);
else g[l].pb(i);
if (f2) vr[r - 1].pb(i);
else g[r].pb(i);
}
}
}
}
cout << c << endl;
}
Compilation message
ili.cpp: In function 'int main()':
ili.cpp:172:13: warning: unused variable 'v1' [-Wunused-variable]
int v1 = 0, v2 = 0;
^~
ili.cpp:172:21: warning: unused variable 'v2' [-Wunused-variable]
int v1 = 0, v2 = 0;
^~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
8 ms |
13696 KB |
Output is correct |
| 2 |
Incorrect |
8 ms |
13696 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
8 ms |
13696 KB |
Output is correct |
| 2 |
Incorrect |
8 ms |
13696 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
8 ms |
13696 KB |
Output is correct |
| 2 |
Incorrect |
8 ms |
13696 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
