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답안 #1063441

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1063441 2024-08-17T18:35:16 Z DeathIsAwe Palembang Bridges (APIO15_bridge) C++14
22 / 100
 125 ms 14860 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++) {
      	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:62:19: 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]
   62 |        if (curpos >= posplaces.size()) {
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~
bridge.cpp:80:23: 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]
   80 |            if (curpos >= posplaces.size()) {
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~
bridge.cpp:188:19: 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]
  188 |     for (int i=0;i<bridgeplaces.size();i++) {
      |                  ~^~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# 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 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 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 1 ms 348 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 556 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 604 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 29 ms 3288 KB Output is correct
13 Correct 113 ms 14860 KB Output is correct
14 Correct 39 ms 4296 KB Output is correct
15 Correct 80 ms 8536 KB Output is correct
16 Correct 46 ms 3784 KB Output is correct
17 Correct 108 ms 14620 KB Output is correct
18 Correct 78 ms 14348 KB Output is correct
19 Correct 125 ms 14784 KB Output is correct
20 Correct 51 ms 3784 KB Output is correct
21 Correct 104 ms 14440 KB Output is correct

Subtask #3
0 / 9.0

# 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 #4
0 / 32.0

# 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 #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 -