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답안 #685173

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
685173 2023-01-23T16:17:13 Z omikron123 Palembang Bridges (APIO15_bridge) C++14
0 / 100
 1 ms 340 KB 
// https://oj.uz/problem/view/APIO15_bridge

#include <cstdio>
#include <algorithm>
#include <functional>
#include <vector>
#include <cstring>
#include <cmath>
using namespace std;
typedef long long ll;

// K=1,2, N=1e5
// 1. 家和办公室在同一边的是不参与计算的，和桥没有关系。
// 2. 最小值都在event点上面取得，而且是一个U型的阶梯函数，所以应该可以固定一个桥的位置，然后binary search另外一个。
// 3. 进一步可以发现K=1的时候，答案就是S[i], T[i]的median. 这已经可以得2/3的分了。

int n, K;
ll ans;
vector<pair<int,int>> x;

int main() {
    scanf("%d %d", &K, &n);
    for (int i = 0; i < n; i++) {
        char c1[10], c2[10];
        int x1, x2;
        scanf("%s %d %s %d", c1, &x1, c2, &x2);
        if (c1[0] == c2[0]) ans += abs(x1-x2);
        else x.push_back({min(x1,x2), max(x1,x2)});
    }

    if (K == 1) {
        // just return the median of all numbers
        vector<int> X;
        for (auto p: x) {
            X.push_back(p.first);
            X.push_back(p.second);
        }
        sort(X.begin(), X.end());
        int m = X[X.size() / 2];
        for (auto p: x) {
            ans += abs(p.first-m) + abs(p.second-m);
        }
    } else {
        
    }

    printf("%lld", ans);

    return 0;
}

Compilation message

bridge.cpp: In function 'int main()':
bridge.cpp:22:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |     scanf("%d %d", &K, &n);
      |     ~~~~~^~~~~~~~~~~~~~~~~
bridge.cpp:26:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |         scanf("%s %d %s %d", c1, &x1, c2, &x2);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 0 ms 340 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 1 ms 340 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Incorrect 0 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 0 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 0 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -