#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
typedef long long ll;
typedef long double ld;
typedef complex<ld> cd;
typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;
typedef vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<cd> vcd;
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define F0R(i, a) for (int i = 0; i < (a); i++)
#define FORd(i,a,b) for (int i = (b)-1; i >= (a); i--)
#define F0Rd(i,a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto& a : x)
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound
#define sz(x) (int)x.size()
#define beg(x) x.begin()
#define en(x) x.end()
#define all(x) beg(x), en(x)
#define resz resize
const int MOD = 1000000007; // 998244353
const ll INF = 1e18;
const int MX = 100001;
const ld PI = 4*atan((ld)1);
template<class T> void ckmin(T &a, T b) { a = min(a, b); }
template<class T> void ckmax(T &a, T b) { a = max(a, b); }
template<class A, class B> A operator+=(A& l, const B& r) { return l = l+r; }
template<class A, class B> A operator-=(A& l, const B& r) { return l = l-r; }
template<class A, class B> A operator*=(A& l, const B& r) { return l = l*r; }
template<class A, class B> A operator/=(A& l, const B& r) { return l = l/r; }
namespace input {
template<class T> void re(complex<T>& x);
template<class T1, class T2> void re(pair<T1,T2>& p);
template<class T> void re(vector<T>& a);
template<class T, size_t SZ> void re(array<T,SZ>& a);
template<class T> void re(T& x) { cin >> x; }
void re(double& x) { string t; re(t); x = stod(t); }
void re(ld& x) { string t; re(t); x = stold(t); }
template<class Arg, class... Args> void re(Arg& first, Args&... rest) {
re(first); re(rest...);
}
template<class T> void re(complex<T>& x) { T a,b; re(a,b); x = cd(a,b); }
template<class T1, class T2> void re(pair<T1,T2>& p) { re(p.f,p.s); }
template<class T> void re(vector<T>& a) { F0R(i,sz(a)) re(a[i]); }
template<class T, size_t SZ> void re(array<T,SZ>& a) { F0R(i,SZ) re(a[i]); }
}
using namespace input;
namespace output {
template<class T1, class T2> void pr(const pair<T1,T2>& x);
template<class T, size_t SZ> void pr(const array<T,SZ>& x);
template<class T> void pr(const vector<T>& x);
template<class T> void pr(const set<T>& x);
template<class T1, class T2> void pr(const map<T1,T2>& x);
template<class T> void pr(const T& x) { cout << x; }
template<class Arg, class... Args> void pr(const Arg& first, const Args&... rest) {
pr(first); pr(rest...);
}
template<class T1, class T2> void pr(const pair<T1,T2>& x) {
pr("{",x.f,", ",x.s,"}");
}
template<class T> void prContain(const T& x) {
pr("{");
bool fst = 1; trav(a,x) pr(!fst?", ":"",a), fst = 0;
pr("}");
}
template<class T, size_t SZ> void pr(const array<T,SZ>& x) { prContain(x); }
template<class T> void pr(const vector<T>& x) { prContain(x); }
template<class T> void pr(const set<T>& x) { prContain(x); }
template<class T1, class T2> void pr(const map<T1,T2>& x) { prContain(x); }
void ps() { pr("\n"); }
template<class Arg, class... Args> void ps(const Arg& first, const Args&... rest) {
pr(first," "); ps(rest...); // print w/ spaces
}
}
using namespace output;
namespace io {
void setIn(string s) { freopen(s.c_str(),"r",stdin); }
void setOut(string s) { freopen(s.c_str(),"w",stdout); }
void setIO(string s = "") {
ios_base::sync_with_stdio(0); cin.tie(0); // fast I/O
if (sz(s)) { setIn(s+".in"), setOut(s+".out"); } // for USACO
}
}
using namespace io;
template<class T> T invGeneral(T a, T b) {
a %= b; if (a == 0) return b == 1 ? 0 : -1;
T x = invGeneral(b,a);
return x == -1 ? -1 : ((1-(ll)b*x)/a+b)%b;
}
template<class T> struct modInt {
T val;
T mod = 0;
// static const T mod = MOD;
void normalize() {
if (mod == 0) return;
val %= mod; if (val < 0) val += mod;
}
modInt(T v = 0, T m = 0) : val(v), mod(m) { normalize(); }
// modInt(T v = 0, T m = 0) : val(v) { normalize(); }
explicit operator T() const { return val; }
friend ostream& operator<<(ostream& os, const modInt& a) { return os << a.val; }
friend bool operator==(const modInt& a, const modInt& b) { return a.val == b.val; }
friend bool operator!=(const modInt& a, const modInt& b) { return !(a == b); }
friend void check(modInt& a, modInt& b) { // make sure all operations are valid
// comment out if mod is static const
if (a.mod > 0 && b.mod > 0) { assert(a.mod == b.mod); return; }
T mod = max(a.mod,b.mod); if (mod == 0) mod = MOD;
if (a.mod != mod) { a.mod = mod; a.normalize(); }
if (b.mod != mod) { b.mod = mod; b.normalize(); }
}
friend modInt operator+(modInt a, modInt b) {
check(a,b); a.val += (T)b;
if (a.val >= a.mod) a.val -= a.mod;
return a;
}
friend modInt operator-(modInt a, modInt b) {
check(a,b); a.val -= (T)b;
if (a.val < 0) a.val += a.mod;
return a;
}
friend modInt operator-(const modInt& a) { return modInt(0)-a; }
friend modInt operator*(modInt a, modInt b) {
check(a,b); a.val = (ll)a.val*(T)b%a.mod; return a;
}
friend modInt exp(modInt a, ll p) {
modInt ans(1,a.mod);
for (; p; p /= 2, a *= a) if (p&1) ans *= a;
return ans;
}
friend modInt inv(const modInt& a) {
return {invGeneral(a.val,a.mod),a.mod};
// return exp(b,b.mod-2) if prime
}
friend modInt operator/(modInt a, modInt b) {
check(a,b); return a*inv(b);
}
};
typedef modInt<int> mi;
typedef pair<mi,mi> pmi;
typedef vector<mi> vmi;
typedef vector<pmi> vpmi;
ll ans;
int N,M,K,match[30001], label[30001], tmp;
vi radj[30001];
deque<int> adj[2001];
queue<int> todo;
bool tri(int x) {
if (label[x] == tmp) return 0;
label[x] = tmp;
trav(i,adj[x]) if (match[i] == 0)
return match[i] = x;
trav(i,adj[x]) if (match[i] != x && tri(match[i]))
return match[i] = x;
return 0;
}
void process() {
while (sz(todo)) {
tmp ++;
if (tri(todo.front())) todo.pop();
else break;
}
}
int main() {
// you should actually read the stuff at the bottom
setIO(); re(N,M,K);
F0R(i,K) {
int A,B; re(A,B);
radj[A].pb(B);
}
FOR(i,1,M+1) todo.push(i);
int r = 0;
FOR(l,1,N+1) {
process();
while (r < N && sz(todo)) {
r ++; trav(i,radj[r]) adj[i].pb(r);
process();
}
if (sz(todo)) break;
ans += N+1-r;
if (match[l]) todo.push(match[l]);
trav(i,radj[l]) adj[i].pop_front();
}
pr(ans);
// you should actually read the stuff at the bottom
}
/* stuff you should look for
* int overflow, array bounds
* special cases (n=1?), set tle
* do smth instead of nothing and stay organized
*/
Compilation message
marriage.cpp: In function 'bool tri(int)':
marriage.cpp:201:25: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
return match[i] = x;
~~~~~~~~~^~~
marriage.cpp:203:25: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
return match[i] = x;
~~~~~~~~~^~~
marriage.cpp: In function 'void io::setIn(std::__cxx11::string)':
marriage.cpp:117:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
void setIn(string s) { freopen(s.c_str(),"r",stdin); }
~~~~~~~^~~~~~~~~~~~~~~~~~~~~
marriage.cpp: In function 'void io::setOut(std::__cxx11::string)':
marriage.cpp:118:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
void setOut(string s) { freopen(s.c_str(),"w",stdout); }
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 2 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 3 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 4 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 5 |
Correct |
3 ms |
2432 KB |
Output is correct |
| 6 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 7 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 8 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 9 |
Correct |
3 ms |
2432 KB |
Output is correct |
| 10 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 11 |
Correct |
3 ms |
2432 KB |
Output is correct |
| 12 |
Correct |
4 ms |
2476 KB |
Output is correct |
| 13 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 14 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 15 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 16 |
Correct |
3 ms |
2432 KB |
Output is correct |
| 17 |
Correct |
3 ms |
2432 KB |
Output is correct |
| 18 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 19 |
Correct |
5 ms |
2432 KB |
Output is correct |
| 20 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 21 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 22 |
Correct |
5 ms |
2432 KB |
Output is correct |
| 23 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 24 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 25 |
Correct |
13 ms |
2560 KB |
Output is correct |
| 26 |
Correct |
7 ms |
2432 KB |
Output is correct |
| 27 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 28 |
Correct |
4 ms |
2432 KB |
Output is correct |
| 29 |
Correct |
6 ms |
2460 KB |
Output is correct |
| 30 |
Correct |
5 ms |
2432 KB |
Output is correct |
| 31 |
Correct |
110 ms |
2760 KB |
Output is correct |
| 32 |
Correct |
6 ms |
2432 KB |
Output is correct |
| 33 |
Correct |
4 ms |
2404 KB |
Output is correct |
| 34 |
Correct |
9 ms |
2432 KB |
Output is correct |
| 35 |
Correct |
114 ms |
3356 KB |
Output is correct |
| 36 |
Correct |
86 ms |
3200 KB |
Output is correct |
| 37 |
Correct |
300 ms |
2908 KB |
Output is correct |
| 38 |
Correct |
22 ms |
3200 KB |
Output is correct |
| 39 |
Correct |
217 ms |
2680 KB |
Output is correct |
| 40 |
Correct |
7 ms |
2688 KB |
Output is correct |
| 41 |
Correct |
10 ms |
2816 KB |
Output is correct |
| 42 |
Correct |
12 ms |
2944 KB |
Output is correct |
| 43 |
Correct |
18 ms |
2944 KB |
Output is correct |
| 44 |
Correct |
21 ms |
3072 KB |
Output is correct |
| 45 |
Correct |
17 ms |
3072 KB |
Output is correct |
| 46 |
Correct |
31 ms |
3612 KB |
Output is correct |
| 47 |
Correct |
25 ms |
3456 KB |
Output is correct |
| 48 |
Correct |
33 ms |
3448 KB |
Output is correct |
| 49 |
Correct |
39 ms |
3676 KB |
Output is correct |
| 50 |
Correct |
513 ms |
2564 KB |
Output is correct |
