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답안 #1063431

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1063431 2024-08-17T18:28:02 Z DeathIsAwe Palembang Bridges (APIO15_bridge) C++14
22 / 100
 145 ms 14576 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int long long


bool compare(pair<int,int> a, pair<int,int> b) {
    if (a.first == b.first) {
        return a.second > b.second;
    }
    return a.first < b.first;
}


int32_t main() {
    char p, q;
    int s, t, k, n; cin >> k >> n;
    ll ans = 0;
    unordered_map<int,int> bruh;
    unordered_map<int,int> sus;
    vector<int> bridgeplaces;
    vector<pair<int, int>> housework;


    if (k == 2) {
    ll baseans = 0;
    for (int i=0;i<n;i++) {
        cin >> p >> s >> q >> t;
        if (p == q) {
            baseans += abs(s - t);
            continue;
        }
        if (t > s) {
            swap(t, s);
        }
        housework.push_back(make_pair(s + t, s - t));
    }
    n = housework.size();


    unordered_set<int> posset;
    pair<int,int> dum;
    vector<int> posplaces;
    for (int i=0;i<n;i++) {
        if (posset.find((housework[i].first - housework[i].second) / 2) == posset.end()) {
            posset.insert((housework[i].first - housework[i].second) / 2);
            posplaces.push_back((housework[i].first - housework[i].second) / 2);
        }
        if (posset.find((housework[i].first + housework[i].second) / 2) == posset.end()) {
            posset.insert((housework[i].first + housework[i].second) / 2);
            posplaces.push_back((housework[i].first + housework[i].second) / 2);
        }
    }

	
    sort(posplaces.begin(), posplaces.end());
    sort(housework.begin(), housework.end(), compare);
    vector<int> ansright(n-1), ansleft(n-1);
    priority_queue<int, vector<int>, greater<int>> lefttown, righttown;
    ll ahead = 0, behind = 0, curpos = 0, sigma, tate; ans = 0;
    for (int i=0;i<n-1;i++) {
        ans += housework[i].second + 1;
        sigma = (housework[i].first - housework[i].second) / 2;
        tate = (housework[i].first + housework[i].second) / 2;
        if (sigma > posplaces[curpos]) {
            ahead++;
            ans += 2 * (sigma - posplaces[curpos]);
            lefttown.push(sigma);
        }
        if (tate == posplaces[curpos]) {
            behind++;
        } else {
            righttown.push(tate);
        }
        while (ahead > behind) {
            curpos++;
          	if (curpos >= posplaces.size()) {
              while (true) {}
            }
            ans -= 2*(ahead - behind)*(posplaces[curpos] - posplaces[curpos - 1]);
            while (!lefttown.empty() && lefttown.top() == posplaces[curpos]) {
                lefttown.pop();
                ahead--;
            }
            while (!righttown.empty() && righttown.top() == posplaces[curpos]) {
                righttown.pop();
                behind++;
            }
        }
        //cout << posplaces[curpos] << '\n';
        ansleft[i] = ans;
    }


    priority_queue<int> lefttown2, righttown2;
    ahead = 0; behind = 0; curpos = posplaces.size() - 1; ans = 0;
    for (int i=n-1;i>0;i--) {
        ans += housework[i].second + 1;
        sigma = (housework[i].first - housework[i].second) / 2;
        tate = (housework[i].first + housework[i].second) / 2;
        if (tate < posplaces[curpos]) {
            ahead++;
            ans += 2 * (posplaces[curpos] - tate);
            righttown2.push(tate);
        }
        if (sigma == posplaces[curpos]) {
            behind++;
        } else {
            lefttown.push(sigma);
        }
        lefttown2.push(sigma);
        while (ahead > behind) {
            curpos--;
            ans -= 2*(ahead - behind)*(posplaces[curpos + 1] - posplaces[curpos]);
            while (!righttown2.empty() && righttown2.top() == posplaces[curpos]) {
                righttown2.pop();
                ahead--;
            }
            while (!lefttown2.empty() && lefttown2.top() == posplaces[curpos]) {
                lefttown2.pop();
                behind++;
            }
        }
        ansright[i - 1] = ans;
    }


    //for (int i=0;i<n-1;i++) {
    //    cout << ansright[i] << ' ';
    //} cout << '\n';
    //for (int i=0;i<n-1;i++) {
    //    cout << ansleft[i] << ' ';
    //} cout << '\n';


    ll realans = INT64_MAX;
    for (int i=0;i<n-1;i++) {
        realans = min(realans, ansleft[i] + ansright[i]);
    }
    cout << realans + baseans;


    return 0;
    }


    ll ahead = 0;
    for (int i=0;i<n;i++) {
        cin >> p >> s >> q >> t;
        if (t > s) {
            swap(t, s);
        }
        if (p == q) {
            ans += abs(s - t);
            continue;
        }
        ahead++;
        housework.push_back(make_pair(t, s));
        if (bruh.find(s) == bruh.end()) {
            bruh[s] = 1;
            if (sus.find(s) == sus.end()) {
                bridgeplaces.push_back(s);
            }
        } else {
            bruh[s]++;
        }
        if (sus.find(t) == sus.end()) {
            sus[t] = 1;
            if (bruh.find(t) == bruh.end()) {
                bridgeplaces.push_back(t);
            }
        } else {
            sus[t]++;
        }
    }


    sort(bridgeplaces.begin(), bridgeplaces.end());
    for (pair<int,int> i: housework) {
        ans += i.first + i.second + 1;
    }
    ll curans = ans;
    ll prev = 0;
    ll visitednum = 0;
    for (int i=0;i<bridgeplaces.size();i++) {
        curans += 2 * (bridgeplaces[i] - prev) * (visitednum - ahead);
        //cout << visitednum << ' ' << ahead << ' ' << bridgeplaces[i] << ' ' << curans << '\n';
        if (bruh.find(bridgeplaces[i]) != bruh.end()) {
            visitednum += bruh[bridgeplaces[i]];
        }
        if (sus.find(bridgeplaces[i]) != sus.end()) {
            ahead -= sus[bridgeplaces[i]];
        }
        ans = min(ans, curans);
        prev = bridgeplaces[i];
    }
    cout << ans;
}

Compilation message

bridge.cpp: In function 'int32_t main()':
bridge.cpp:77:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |            if (curpos >= posplaces.size()) {
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~
bridge.cpp:185:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  185 |     for (int i=0;i<bridgeplaces.size();i++) {
      |                  ~^~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 2 ms 444 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 1 ms 548 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 2 ms 448 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 2 ms 576 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 2 ms 344 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 2 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 33 ms 3224 KB Output is correct
13 Correct 127 ms 14576 KB Output is correct
14 Correct 71 ms 4296 KB Output is correct
15 Correct 72 ms 8532 KB Output is correct
16 Correct 46 ms 3860 KB Output is correct
17 Correct 145 ms 14360 KB Output is correct
18 Correct 71 ms 14364 KB Output is correct
19 Correct 119 ms 14364 KB Output is correct
20 Correct 53 ms 3784 KB Output is correct
21 Correct 143 ms 14416 KB Output is correct

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 2 ms 604 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 3 ms 600 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 2 ms 604 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -