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답안 #1063443

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1063443 2024-08-17T18:35:48 Z DeathIsAwe Palembang Bridges (APIO15_bridge) C++14
22 / 100
 123 ms 12320 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;
    while (true) {}
    ll ahead = 0, behind = 0, curpos = 0, sigma, tate; ans = 0;
    for (int i=0;i<n-1;i++) {
      	if (curpos >= posplaces.size()) {
            while (true) {}
        }
        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:63:19: 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]
   63 |        if (curpos >= posplaces.size()) {
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~
bridge.cpp:81:23: 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]
   81 |            if (curpos >= posplaces.size()) {
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~
bridge.cpp:189:19: 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]
  189 |     for (int i=0;i<bridgeplaces.size();i++) {
      |                  ~^~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

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

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 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 532 KB Output is correct
12 Correct 27 ms 2600 KB Output is correct
13 Correct 114 ms 12312 KB Output is correct
14 Correct 46 ms 3268 KB Output is correct
15 Correct 77 ms 7120 KB Output is correct
16 Correct 45 ms 2512 KB Output is correct
17 Correct 113 ms 12316 KB Output is correct
18 Correct 69 ms 12316 KB Output is correct
19 Correct 123 ms 12312 KB Output is correct
20 Correct 50 ms 2496 KB Output is correct
21 Correct 118 ms 12320 KB Output is correct

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 2 ms 856 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 2 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 -