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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#379976 | #8566. Can We Still Qualify For Semifinals? | ucup-team3215# | AC ✓ | 5ms | 3824kb | C++23 | 3.7kb | 2024-04-06 20:21:34 | 2024-04-06 20:21:34 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define all(x) (x).begin(), (x).end()
using pii = array<int, 2>;
using vi = vector<int>;
array<pii, 45> mt;
struct Dinic {
struct Edge {
int to, rev;
int c, oc;
int flow() { return max(oc - c, 0); }
};
vi lvl, ptr, q;
vector<vector<Edge>> adj;
Dinic(int n) : lvl(n), ptr(n), q(n), adj(n) {}
void addEdge(int a, int b, int c, int rcap = 0) {
adj[a].emplace_back(b, adj[b].size(), c, c);
adj[b].emplace_back(a, adj[a].size() - 1, rcap, rcap);
}
int dfs(int v, int t, int f) {
if (v == t || !f)return f;
for (int &i = ptr[v]; i < size(adj[v]); ++i) {
Edge &e = adj[v][i];
if (lvl[e.to] == lvl[v] + 1)
if (int p = dfs(e.to, t, min(f, e.c))) {
e.c -= p, adj[e.to][e.rev].c += p;
return p;
}
}
return 0;
}
int calc(int s, int t) {
int flow = 0;
q[0] = s;
int L = 30;
do {
lvl = ptr = vi(size(q));
int qi = 0, qe = lvl[s] = 1;
while (qi < qe && !lvl[t]) {
int v = q[qi++];
for (auto e: adj[v]) {
if (!lvl[e.to] && e.c >> (30 - L))
q[qe++] = e.to, lvl[e.to] = lvl[v] + 1;
}
}
while (int p = dfs(s, t, (int) 2e9 + 13))flow += p;
} while (lvl[t]);
return flow;
}
bool leftOfMinCut(int a) { return lvl[a] != 0; }
};
void solve() {
int n;
string s;
cin >> n >> s;
vi wold(10);
for (int i = 0; i < n; ++i) {
int b = s[i] - '0';
++wold[mt[i][b ^ 1]];
}
for (int i = n; i < 45; ++i) {
auto [x, y] = mt[i];
if (x == 0) {
++wold[x];
}
}
for (int a1 = 1; a1 < 10; ++a1) {
for (int a2 = a1; a2 < 10; ++a2) {
for (int a3 = a2; a3 < 10; ++a3) {
vi w(wold);
vi bst(10);
bst[a1] = 1;
bst[a2] = 1;
bst[a3] = 1;
Dinic sol(100);
int val = w[0];
int nxt = 0;
bool ok = true;
for (int i = n; i < 45; ++i) {
auto [x, y] = mt[i];
if (x == 0 || bst[x] || bst[y]) {
continue;
}
int who = 1 + nxt++;
sol.addEdge(0, who, 1);
sol.addEdge(who, 50 + x, 1);
sol.addEdge(who, 50 + y, 1);
}
for (int i = 1; i < 10; ++i) {
if (bst[i])continue;
if(w[i] <= val)sol.addEdge(50 + i, 90, val-w[i]);
else ok=false;
}
if (sol.calc(0, 90) == nxt && ok) {
cout << "YES\n";
return;
}
}
}
}
cout << "NO\n";
}
int main() {
vi p(10);
iota(all(p), 0);
for (int i = 0; i < 9; ++i) {
for (int j = 0; j < 5; ++j) {
mt[i * 5 + j] = {p[j], p[9 - j]};
}
vi pn(p);
pn[1] = p.back();
for (int j = 2; j < 10; ++j) {
pn[j] = p[j - 1];
}
p = pn;
}
// for (int i = 0; i < 45; ++i) {
// if (i % 5 == 0) {
// cout << endl;
// }
// cout << mt[i][0] + 1 << ' ' << mt[i][1] + 1 << endl;
// }
int t;
cin >> t;
while (t--) {
solve();
}
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 3620kb
input:
3 3 111 25 1000010101111111111010100 35 01111011110111101111011110111101111
output:
YES YES NO
result:
ok 3 token(s): yes count is 2, no count is 1
Test #2:
score: 0
Accepted
time: 1ms
memory: 3628kb
input:
10 16 0110000001010100 17 01111000110110101 15 001100010101111 16 0010101010011100 19 0000000100010110100 16 0011101010011100 18 011110010001100000 18 000110101001100011 20 01100010000100100100 15 001000111001101
output:
YES YES YES YES YES YES YES YES YES YES
result:
ok 10 token(s): yes count is 10, no count is 0
Test #3:
score: 0
Accepted
time: 3ms
memory: 3792kb
input:
10 37 0110000001010100011101001011100110001 39 000100111101101001100101101000000000100 35 00111000100111100101011010111100100 33 010000010001110010110001101110001 30 000100010100000010010110101010 31 0000101000011010101001010000000 44 00001000000111101011010110000101100011000100 42 01111011110001001...
output:
NO NO NO NO NO NO NO NO NO NO
result:
ok 10 token(s): yes count is 0, no count is 10
Test #4:
score: 0
Accepted
time: 2ms
memory: 3824kb
input:
10 23 01100000010101000111010 38 01111001100011000101011110101001101001 27 010000000001001001110001001 26 01101001110011101101000110 8 00001000 22 0110100110001110110001 9 000100010 24 000000100101101010100100 6 011000 29 01101010100101000000000000100
output:
YES NO NO NO YES YES YES YES YES NO
result:
ok 10 token(s): yes count is 6, no count is 4
Test #5:
score: 0
Accepted
time: 3ms
memory: 3572kb
input:
10 30 011000000101010001110100101110 29 01001010010011101110010110010 28 0110000000001000101101001001 23 01101001110011101101000 23 01000001000111001011000 24 011110001000010001010000 23 01001011010101001000011 30 000110011001010010000000000010 24 000110111001110011000011 28 000110001000011011110110...
output:
NO NO NO YES YES YES YES NO YES NO
result:
ok 10 token(s): yes count is 5, no count is 5
Test #6:
score: 0
Accepted
time: 1ms
memory: 3664kb
input:
10 21 011000000101010001110 21 000110110101001010010 22 0111101101001100101101 24 000000001000101011000101 21 011010011100111011010 20 00110000010001101010 21 010010111100010000100 24 010100000100011010110010 23 00001010000110101010010 25 0000000000001000001101110
output:
YES YES YES YES YES YES YES YES YES YES
result:
ok 10 token(s): yes count is 10, no count is 0
Test #7:
score: 0
Accepted
time: 5ms
memory: 3624kb
input:
10 26 01100000010101000111010010 26 01101010010100100111011100 26 00110010110100000000010010 27 011100010101110010110101101 30 010100011000001000110101001100 30 011110001000010001010000001001 28 0101100101000010100001101010 26 00101000000000000100000110 28 0110101101010000111000110001 27 00011011110...
output:
NO NO NO NO NO NO NO NO NO NO
result:
ok 10 token(s): yes count is 0, no count is 10
Test #8:
score: 0
Accepted
time: 4ms
memory: 3616kb
input:
10 25 0010100010011010111001111 26 01001010100010101010001010 26 01111001110000100111011110 26 10001000100110101110011110 26 10101010100110101110011110 27 110100010101010011010111001 27 101010101001101011100111101 31 1000010001010100110001011011110 37 1000101111000100110000011000000100101 40 1000101...
output:
NO NO NO NO NO NO NO NO NO NO
result:
ok 10 token(s): yes count is 0, no count is 10
Test #9:
score: 0
Accepted
time: 5ms
memory: 3636kb
input:
10 26 00001010000000000000000000 26 00000010000000000000000000 26 01101010100010101011011110 26 00011011110111101111011110 27 001100110101011001110111101 27 000110111101111011110111101 28 0110001001000010011101111011 29 01000000010001101000011110111 29 01000000010000101101011110111 30 01000011110111...
output:
YES YES YES YES YES YES YES YES YES NO
result:
ok 10 token(s): yes count is 9, no count is 1
Test #10:
score: 0
Accepted
time: 1ms
memory: 3632kb
input:
10 1 0 2 00 10 0001101110 14 00101010000011 20 00000010010100101010 25 0000000101000100100001111 35 01110011010000101010000010010000100 40 0000100110001110101100001001000110000001 44 01011010110010101110011000010001010011100011 45 010010001001010011110111101011011000000100001
output:
YES YES YES YES YES YES NO NO NO NO
result:
ok 10 token(s): yes count is 6, no count is 4
Extra Test:
score: 0
Extra Test Passed