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ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#142592 | #6517. Computational Geometry | BUET_POTATOES# | WA | 2ms | 3668kb | C++20 | 1.7kb | 2023-08-19 13:27:24 | 2023-08-19 13:27:26 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using LL = long long;
using pll = pair<LL, LL>;
using pii = pair<int, int>;
LL dis(pii a, pii b){
LL x = a.first - b.first, y = a.second - b.second;
return x * x + y * y;
}
const int N = 5e3 + 5;
LL dp[N][N];
LL dp2[N][N];
pii points[N];
LL area(pii a, pii b, pii c){
return a.first * b.second + b.first * c.second + c.first * a.second - a.second * b.first - b.second * c.first - a.first * c.second;
}
void testcase(int cs){
int n;
cin >> n;
for(int i = 0; i < n; i++){
cin >> points[i].first >> points[i].second;
}
for(int i = 0; i < n; i++){
for(int j = 0; j < n; j++)dp[i][j] = dp2[i][j] = 0;
}
for(int len = 1; len < n; len++){
for(int i = 0; i < n; i++){
dp[i][(i + len) % n] = max(dp[i][(i + len - 1) % n], max(dp[(i + 1) % n][(i + len) % n], dis(points[i], points[(i + len) % n])));
dp2[i][(i + len) % n] = dp2[(i + 1) % n][(i + len - 1) % n] + area(points[i], points[(i + 1) % n], points[(i + len) % n]);
}
}
// for(int i = 0; i < n; i++){
// for(int j = 0; j < n; j++){
// cout << dp[i][j] << ' ';
// }
// cout << endl;
// }
LL ans = LLONG_MAX;
for(int i = 0; i < n; i++){
for(int j = i + 1; j < n; j++){
if(dp2[i][j] > 0 && dp2[j][i] > 0){
ans = min(ans, dp[i][j] + dp[j][i]);
}
}
}
cout << ans << "\n";
}
/*
2
4
1 0
2 0
1 1
0 0
6
10 4
9 7
5 7
4 5
6 4
9 3
*/
int main(){
ios::sync_with_stdio(false);
cin.tie(NULL);
int T;
cin >> T;
for(int i = 1; i <= T; i++){
testcase(i);
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 3464kb
input:
2 4 1 0 2 0 1 1 0 0 6 10 4 9 7 5 7 4 5 6 4 9 3
output:
4 44
result:
ok 2 number(s): "4 44"
Test #2:
score: 0
Accepted
time: 2ms
memory: 3668kb
input:
713 8 8 25 3 15 0 5 10 0 19 2 24 6 23 15 15 34 8 25 16 18 25 10 32 1 23 0 14 21 0 27 2 32 6 7 16 15 8 20 1 16 0 12 16 0 21 1 24 5 7 15 1 18 0 24 8 27 15 4 19 0 17 7 8 4 10 20 0 30 15 0 14 10 6 15 0 24 10 21 14 12 14 7 11 0 3 7 18 7 16 9 12 10 6 9 0 4 5 0 15 1 9 0 23 8 13 14 6 24 0 34 1 41 11 37 20 1...
output:
1075 1389 706 687 1550 497 300 1668 471 162 519 190 786 983 367 930 580 524 509 275 617 298 146 1330 494 965 599 1321 866 1210 233 398 560 1548 871 938 366 500 371 1118 1222 1994 712 586 858 624 697 575 1274 882 1035 406 934 670 990 1231 513 2871 939 2735 1610 834 721 585 203 198 1666 617 1166 326 2...
result:
ok 713 numbers
Test #3:
score: -100
Wrong Answer
time: 2ms
memory: 3508kb
input:
723 6 219724071 0 454078946 131628774 497404433 165947891 427997418 299842932 68283732 510015817 0 327227140 5 277969751 0 576739203 275664810 244855879 638262097 13873538 700473186 0 59956198 10 69526931 509564969 0 395765436 101436487 0 273066511 46581979 904969235 467379058 942000353 535129295 93...
output:
320990950510053393 968884527011601758 1163242582706157378 879865062732368658 687212580211797154 676902408919929130 1149257533361626411 1299507111430287834 845514798756141601 410893515758460170 340494552567169125 1081804053405835929 1220017957053127490 1287649707801629195 993125871111020743 938163905...
result:
wrong answer 2nd numbers differ - expected: '818929519958899381', found: '968884527011601758'