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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#378298 | #8566. Can We Still Qualify For Semifinals? | ucup-team2112# | AC ✓ | 2ms | 3852kb | C++20 | 5.5kb | 2024-04-06 10:58:14 | 2024-04-06 10:58:15 |
Judging History
answer
#include <bits/stdc++.h>
template<class T>
struct Dinic {
const int n;
struct edge {
int to;
T cap;
edge(int to, T cap) : to(to), cap(cap) {}
};
std::vector<edge> e;
std::vector<std::vector<int> > adj;
std::vector<int> cur, h;
Dinic(int n) : n(n), adj(n) {}
bool bfs(int s, int t) {
h.assign(n, -1);
std::queue<int> que;
h[s] = 0;
que.push(s);
while (!que.empty()) {
const int u = que.front();
que.pop();
for (int i : adj[u]) {
auto [v, c] = e[i];
if (c > 0 && h[v] == -1) {
h[v] = h[u] + 1;
if (v == t) {
return true;
}
que.push(v);
}
}
}
return false;
}
T dfs(int u, int t, T f) {
if (u == t) {
return f;
}
auto r = f;
for (int &i = cur[u]; i < int(adj[u].size()); ++i) {
const int j = adj[u][i];
auto [v, c] = e[j];
if (c > 0 && h[v] == h[u] + 1) {
auto a = dfs(v, t, std::min(r, c));
e[j].cap -= a;
e[j ^ 1].cap += a;
r -= a;
if (r == 0) {
return f;
}
}
}
return f - r;
}
void addedge(int u, int v, T c) {
adj[u].push_back(e.size());
e.emplace_back(v, c);
adj[v].push_back(e.size());
e.emplace_back(u, 0);
}
T maxflow(int s, int t) {
T ans = 0;
while (bfs(s, t)) {
cur.assign(n, 0);
ans += dfs(s, t, std::numeric_limits<T>::max());
}
return ans;
}
};
void solve(){
int n;
std::string s;
std::cin >> n >> s;
std::vector<std::pair<int, int> > match;
{
std::vector<int> team(10);
std::iota(team.begin(), team.end(), 0);
for (int i = 0; i < 9; i += 1) {
for (int l = 0, r = 9; l < r; l += 1, r -= 1) {
match.emplace_back(team[l], team[r]);
// std::cerr << team[l] + 1 << " " << team[r] + 1 << "\n";
}
std::reverse(team.begin() + 1, team.end());
std::rotate(team.begin() + 1, team.begin() + 2, team.end());
std::reverse(team.begin() + 1, team.end());
// for (auto x : team) {
// std::cerr << x << " ";
// }
// std::cerr << "\n";;
}
}
std::reverse(match.begin(), match.end());
std::vector<int> win(10);
for (auto c : s) {
auto [a, b] = match.back();
std::cerr << a + 1 << " " << b + 1 << "\n";
match.pop_back();
if (c == '1') {
win[a] += 1;
}
else {
win[b] += 1;
}
}
{
decltype(match) a;
for (int i = 0; i < match.size(); i += 1) {
auto [x, y] = match[i];
if (x == 0 or y == 0) {
win[0] += 1;
}
else {
a.emplace_back(x, y);
}
}
match = a;
}
int v = win[0];
for (int i = 1; i < 10; i += 1) {
for (int j = i + 1; j < 10; j += 1) {
for (int k = j + 1; k < 10; k += 1) {
decltype(match) new_match;
for (auto [x, y] : match) {
if (x == i or x == j or x == k or y == i or y == j or y == k) {
continue;
}
new_match.emplace_back(x, y);
}
bool nice = true;
for (int x = 1; x < 10; x += 1) {
if (x == i or x == j or x == k) {
continue;
}
if (win[x] > v) {
nice = false;
break;
}
}
if (not nice) {
continue;
}
int nl = new_match.size();
int nr = 6;
Dinic<int> dinic(nl + nr + 2);
for (int i = 1; i <= nl; i += 1) {
dinic.addedge(0, i, 1);
}
std::vector<int> label(10);
for (int x = 1, c = 0; x < 10; x += 1) {
if (x == i or x == j or x == k) {
continue;
}
c += 1;
label[x] = c;
dinic.addedge(nl + c, nl + nr + 1, v - win[x]);
}
for (int i = 0; i < nl; i += 1) {
auto [x, y] = new_match[i];
x = label[x];
y = label[y];
dinic.addedge(i + 1, nl + x, 1);
dinic.addedge(i + 1, nl + y, 1);
}
int res = dinic.maxflow(0, nl + nr + 1);
if (res == nl) {
std::cout << "YES\n";
return;
}
}
}
}
std::cout << "NO\n";
}
int main(){
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
std::cout.tie(nullptr);
int T;
std::cin >> T;
while(T--) {
solve();
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3800kb
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: 0ms
memory: 3604kb
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: 0ms
memory: 3600kb
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: 3632kb
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: 2ms
memory: 3576kb
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: 2ms
memory: 3596kb
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: 2ms
memory: 3836kb
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: 2ms
memory: 3832kb
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: 2ms
memory: 3852kb
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: 2ms
memory: 3548kb
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