#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
using ll = long long;
const int _N = 100009;
struct line {
int p, l, r;
};
long long ans;
int P, Q, A[_N], B[_N], C[_N], D[_N], pa[_N], lc;
line L[_N];
int getx(vector<int> &S, int x) { return lower_bound(S.begin(), S.end(), x) - S.begin() + 1; }
int root(int x) {
if(pa[x] == x) return x;
return pa[x] = root(pa[x]);
}
void merg(int u, int v) {
u = root(u); v = root(v);
if(u != v) pa[u] = v;
}
void dnc_y(int s, int e, vector<int> &V, vector<int> &H) {
if(V.empty() || H.empty()) return;
vector<int> MV, NV, LH, RH;
int m = s+e >> 1;
for(auto& it: V) {
if(L[it].r < s || e < L[it].l) continue;
if(L[it].l <= s && e <= L[it].r) MV.push_back(it);
else NV.push_back(it);
}
for(auto& it: H) {
if(L[it].p <= m) LH.push_back(it);
else RH.push_back(it);
}
if(s != e) {
dnc_y(s, m, NV, LH);
dnc_y(m+1, e, NV, RH);
}
if(MV.size()) {
ans += (ll)MV.size() * (ll)H.size();
for(auto& it: MV) merg(it, H[0]);
for(auto& it: H) merg(it, H[0]);
}
}
void dnc_x(int s, int e, vector<int> &V, vector<int> &H) {
if(V.empty() || H.empty()) return;
vector<int> LV, RV, NH, MH;
int m = s+e >> 1;
for(auto& it: V) {
if(L[it].p <= m) LV.push_back(it);
else RV.push_back(it);
}
for(auto& it: H) {
if(L[it].r < s || e < L[it].l) continue;
if(L[it].l <= s && e <= L[it].r) MH.push_back(it);
else NH.push_back(it);
}
if(s != e) {
dnc_x(s, m, LV, NH);
dnc_x(m+1, e, RV, NH);
}
dnc_y(1, Q, V, MH);
}
int main() {
vector<int> XS, YS;
int W, H, N, V, E; scanf("%d%d%d",&W,&H,&N);
XS.push_back(0); XS.push_back(W);
YS.push_back(0); YS.push_back(H);
for(int i=0; i<N; i++) {
scanf("%d%d%d%d", &A[i], &B[i], &C[i], &D[i]);
XS.push_back(A[i]); XS.push_back(B[i]);
YS.push_back(C[i]); YS.push_back(D[i]);
}
sort(XS.begin(), XS.end()); XS.resize(unique(XS.begin(), XS.end()) - XS.begin());
sort(YS.begin(), YS.end()); YS.resize(unique(YS.begin(), YS.end()) - YS.begin());
W = getx(XS, W); H = getx(YS, H);
for(int i=0; i<N; i++) {
A[i] = getx(XS, A[i]);
B[i] = getx(YS, B[i]);
C[i] = getx(XS, C[i]);
D[i] = getx(YS, D[i]);
}
ans = -N-4;
vector<int> VL, HL;
L[++lc] = {1, 1, H}; VL.push_back(lc);
L[++lc] = {W, 1, H}; VL.push_back(lc);
L[++lc] = {1, 1, W}; HL.push_back(lc);
L[++lc] = {H, 1, W}; HL.push_back(lc);
for(int i=0; i<N; i++) {
if(A[i] == C[i]) {
L[++lc] = {A[i], B[i], D[i]};
VL.push_back(lc);
}
if(B[i] == D[i]) {
L[++lc] = {B[i], A[i], C[i]};
HL.push_back(lc);
}
}
for(int i=1; i<=lc; i++) pa[i] = i;
P = XS.size(), Q = YS.size();
dnc_x(1, P, VL, HL);
//for(int i=1; i<=lc; i++) if(root(i) == i) ++ans;
printf("%lld", ans+1);
return 0;
}
//f = c-v+e
Compilation message
2014_ho_t5.cpp: In function 'void dnc_y(int, int, std::vector<int>&, std::vector<int>&)':
2014_ho_t5.cpp:29:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int m = s+e >> 1;
~^~
2014_ho_t5.cpp: In function 'void dnc_x(int, int, std::vector<int>&, std::vector<int>&)':
2014_ho_t5.cpp:53:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int m = s+e >> 1;
~^~
2014_ho_t5.cpp: In function 'int main()':
2014_ho_t5.cpp:72:15: warning: unused variable 'V' [-Wunused-variable]
int W, H, N, V, E; scanf("%d%d%d",&W,&H,&N);
^
2014_ho_t5.cpp:72:18: warning: unused variable 'E' [-Wunused-variable]
int W, H, N, V, E; scanf("%d%d%d",&W,&H,&N);
^
2014_ho_t5.cpp:72:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
int W, H, N, V, E; scanf("%d%d%d",&W,&H,&N);
~~~~~^~~~~~~~~~~~~~~~~~~
2014_ho_t5.cpp:76:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d%d%d", &A[i], &B[i], &C[i], &D[i]);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
5 ms |
384 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
5 ms |
384 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
7 ms |
384 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
5 ms |
384 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
5 ms |
384 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
