| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 1034042 |
2024-07-25T09:00:24 Z |
김은성(#10970) |
Tiles (BOI24_tiles) |
C++17 |
|
62 ms |
29696 KB |
#include <bits/stdc++.h>
using namespace std;
#define x first
#define y second
typedef long long ll;
int a[1009][1009], b[1009][1009];
bool impos[1009];
int orgx[600009];
ll ccw(pair<ll, ll> p, pair<ll, ll> q, pair<ll, ll> r){
return (q.x-p.x)*(r.y-p.y) + (r.x-p.x)*(q.y-p.y);
}
int main(){
int n, xm, ym = 1000, i, j;
scanf("%d %d", &n, &xm);
vector<pair<int, int> > p(n), p1(n);
vector<pair<int, int> > xg, yg;
for(i=0; i<n; i++){
scanf("%d %d", &p[i].x, &p[i].y);
xg.push_back(make_pair(p[i].x, i));
yg.push_back(make_pair(p[i].y, i));
}
p1= p;
for(i=0; i<n; i++){
if(ccw(p[i], p[(i+1)%n], p[(i+2)%n]) < 0){
for(i=0; i<n/2; i++)
swap(p[i], p[n-1-i]);
for(i=0; i<n; i++){
xg[i].second = n-1-xg[i].second;
yg[i].second = n-1-yg[i].second;
}
break;
}
}
xg.push_back(make_pair(0, -1));
yg.push_back(make_pair(0, -1));
sort(xg.begin(), xg.end());
sort(yg.begin(), yg.end());
int prev = -1;
for(i=0; i<=600006; i++)
orgx[i] = i;
int prev_orgg = -1;
for(i=0; i<n; i++){
int orgg = xg[i+1].first, now = xg[i+1].first;
if(xg[i+1].first - xg[i].first >= 4 || prev_orgg == orgg){
int d = (xg[i+1].first - xg[i].first - 2) / 2 * 2;
int temp = xg[i+1].first - (xg[i+1].first - xg[i].first - 2) / 2 * 2;
if(prev_orgg == orgg)
temp = xg[i].first;
orgx[temp] = xg[i+1].first;
now = temp;
xg[i+1].first = temp;
//printf("orgg=%d temp=%d\n", orgg, temp);
if(xg[i+1].second != -1)
p[xg[i+1].second].x = temp;
}
else
orgx[xg[i+1].first] = xg[i+1].first;
for(int x=prev+1; x<=now; x++){
orgx[x] = orgg- (now-x);
//printf("orgx[%d]=%d\n", x, orgx[x]);
}
prev_orgg = orgg;
//printf("prev=%d now=%d\n", prev, now);
prev = now;
}
xm = xg.back().first;
prev_orgg = -1;
for(i=0; i<n; i++){
int orgg = yg[i+1].first;
if(yg[i+1].first - yg[i].first >= 4 || prev_orgg == orgg){
int temp = yg[i+1].first - (yg[i+1].first - yg[i].first - 2) / 2 * 2;
if(prev_orgg == orgg)
temp = yg[i].first;
yg[i+1].first = temp;
p[yg[i+1].second].y = temp;
}
prev_orgg = orgg;
}
for(i=0; i<n; i++){
int x1 = p[i].first, y1 = p[i].second;
int x2 = p[(i+1)%n].first, y2 = p[(i+1)%n].second;
//printf("(%d, %d)\n", p[i].first, p[i].second);
if(y1 == y2){
if(x1 < x2){
for(j=x1; j<x2; j++)
a[j][y1]--;
}
else{
for(j=x1-1; j>=x2; j--)
a[j][y2]++;
}
}
}
for(i=0; i<=xm; i++){
for(j=0; j<=ym; j++){
a[i][j] += (j==0 ? 0 : a[i][j-1]);
//printf("%d", a[i][j]);
b[i][j] = a[i][j];
}
//printf("\n");
}
bool flag = 0;
for(i=0; i<=ym; i++){
int cur = 0;
bool flag = 0;
for(j=0; j<=xm; j++){
if(!a[j][i]){
if(cur%2==1)
flag = 1;
cur = 0;
}
else
cur++;
if(flag || cur%2)
impos[j] = 1;
if(cur%2)
b[j+1][i] = 0;
}
}
for(i=0; i<=xm; i++){
int cur = 0;
for(j=0; j<=ym; j++){
if(!b[i][j]){
if(cur%2 == 1){
flag = 1;
break;
}
cur = 0;
}
else
cur++;
}
if(flag)
impos[i] = 1;
}
int opt = 0;
for(i=0; i<xm; i++){
if(!impos[i])
opt = i+1;
}
int res = orgx[opt];
//int n, xm, i, j, x, y;
//scanf("%d %d", &n, &xm);
vector<pair<int, int> > pp;
pp.push_back(make_pair(0, 0));
for(i=0; i<n-1; i++){
int x2 = p1[i].x, y2 = p1[i].y;
if(pp.size() >= 2 && ((pp[pp.size()-2].x == pp[pp.size()-1].x && pp.back().x==x2) ||
(pp[pp.size()-2].y == pp[pp.size()-1].y && pp.back().y==y2)))
pp.pop_back();
pp.push_back(make_pair(x2, y2));
}
opt = 0;
for(i=0; i<pp.size(); i++){
//printf("x=%d y=%d\n", p[i].x, p[i].y);
if(pp[i].x%2==0 && pp[i].y%2==0)
opt= pp[i].x;
else{
opt = pp[i].x/2*2;
break;
}
}
assert(res== opt);
printf("%d\n", opt);
return 0;
}
Compilation message
Main.cpp: In function 'int main()':
Main.cpp:45:17: warning: unused variable 'd' [-Wunused-variable]
45 | int d = (xg[i+1].first - xg[i].first - 2) / 2 * 2;
| ^
Main.cpp:154:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
154 | for(i=0; i<pp.size(); i++){
| ~^~~~~~~~~~
Main.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
14 | scanf("%d %d", &n, &xm);
| ~~~~~^~~~~~~~~~~~~~~~~~
Main.cpp:18:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
18 | scanf("%d %d", &p[i].x, &p[i].y);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 3 |
Runtime error |
3 ms |
5212 KB |
Execution killed with signal 6 |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 3 |
Runtime error |
3 ms |
5212 KB |
Execution killed with signal 6 |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
10 ms |
10588 KB |
Output is correct |
| 2 |
Runtime error |
16 ms |
15980 KB |
Execution killed with signal 11 |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
4 ms |
5468 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 2 |
Runtime error |
36 ms |
22104 KB |
Execution killed with signal 11 |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
62 ms |
29696 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 3 |
Runtime error |
3 ms |
5212 KB |
Execution killed with signal 6 |
| 4 |
Halted |
0 ms |
0 KB |
- |
