Submission #894502

#	Time	Username	Problem	Language	Result	Execution time	Memory
894502		salmon	Palembang Bridges (APIO15_bridge)	C++14	0 / 100	1 ms	504 KiB

bridge

#include <bits/stdc++.h>
using namespace std;

int N;
int K;
char c,c1;
vector<pair<long long int,pair<int,int>>> v;
long long int h,h1;
long long int sum = 0;
long long int ans = 0;
long long int big = 1e18;
long long int lst[100100];

int main(){

    scanf(" %d",&K);
    scanf(" %d",&N);

    set<pair<int,int>> s;
    map<int,int> mep;

    for(int i = 0; i < N; i++){
        scanf(" %c",&c);
        scanf(" %lld",&h);
        scanf(" %c",&c1);
        scanf(" %lld",&h1);

        if(c == c1){
            ans += abs(h - h1);
        }
        else{
            v.push_back(make_pair(h + h1, make_pair(h,h1)));
        }
    }

    sort(v.begin(),v.end());

    auto it = s.begin();

    lst[0] = 0;

    for(int i = 0; i < v.size(); i++){
        if(i == 0){
            sum = abs(v[i].second.second - v[i].second.first);
            s.insert(make_pair(v[i].second.second, mep[v[i].second.second]));
            mep[v[i].second.second]++;
            s.insert(make_pair(v[i].second.first, mep[v[i].second.first]));
            mep[v[i].second.first]++;
            it = s.begin();
        }
        else{
            int flag = 0;

            pair<int,int> ii = make_pair(v[i].second.first, mep[v[i].second.first] );
            mep[v[i].second.first]++;
            pair<int,int> ii1 = make_pair(v[i].second.second, mep[v[i].second.second]);
            mep[v[i].second.second]++;

            flag += (*it) < ii;
            flag += (*it) < ii1;

            int lum = 0;

            if(flag == 0){
                s.insert(ii);
                s.insert(ii1);

                lum += it -> first;
                advance(it,-1);
                lum -= it -> first;

                sum += abs(it -> first - ii.first);
                sum += abs(it -> first - ii1.first);
                sum += abs(lum);
            }
            if(flag == 1){
                s.insert(ii);
                s.insert(ii1);

                sum += abs(it -> first - ii.first);
                sum += abs(it -> first - ii1.first);
            }
            if(flag == 2){
                s.insert(ii);
                s.insert(ii1);

                advance(it,-1);

                sum += abs(it -> first - ii.first);
                sum += abs(it -> first - ii1.first);
            }
        }

        lst[i + 1] = sum;
    }

    s.clear();
    mep.clear();
    big = sum + ans;

    for(int i = v.size() - 1; i >= 0; i--){
        if(i == v.size() - 1){
            sum = abs(v[i].second.second - v[i].second.first);
            s.insert(make_pair(v[i].second.second, mep[v[i].second.second]));
            mep[v[i].second.second]++;
            s.insert(make_pair(v[i].second.first, mep[v[i].second.first]));
            mep[v[i].second.first]++;
            it = s.begin();
        }
        else{
            int flag = 0;

            pair<int,int> ii = make_pair(v[i].second.first, mep[v[i].second.first] );
            mep[v[i].second.first]++;
            pair<int,int> ii1 = make_pair(v[i].second.second, mep[v[i].second.second]);
            mep[v[i].second.second]++;

            flag += (*it) < ii;
            flag += (*it) < ii1;

            int lum = 0;

            if(flag == 0){
                s.insert(ii);
                s.insert(ii1);

                lum += it -> first;
                advance(it,-1);
                lum -= it -> first;

                sum += abs(it -> first - ii.first);
                sum += abs(it -> first - ii1.first);
                sum += abs(lum);
            }
            if(flag == 1){
                s.insert(ii);
                s.insert(ii1);

                sum += abs(it -> first - ii.first);
                sum += abs(it -> first - ii1.first);
            }
            if(flag == 2){
                s.insert(ii);
                s.insert(ii1);

                advance(it,-1);

                sum += abs(it -> first - ii.first);
                sum += abs(it -> first - ii1.first);
            }
        }

        big = min(big, lst[i] + sum + ans);
    }

    if(K == 2) printf("%lld",big + v.size());
    else printf("%lld", lst[v.size()] + ans + v.size());

}
/*
1 5
B 0 A 4
B 1 B 3
A 5 B 7
B 2 A 6
B 1 A 7
*/

Compilation message (stderr)

bridge.cpp: In function 'int main()':
bridge.cpp:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for(int i = 0; i < v.size(); i++){
      |                    ~~^~~~~~~~~~
bridge.cpp:102:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  102 |         if(i == v.size() - 1){
      |            ~~^~~~~~~~~~~~~~~
bridge.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     scanf(" %d",&K);
      |     ~~~~~^~~~~~~~~~
bridge.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |     scanf(" %d",&N);
      |     ~~~~~^~~~~~~~~~
bridge.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         scanf(" %c",&c);
      |         ~~~~~^~~~~~~~~~
bridge.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         scanf(" %lld",&h);
      |         ~~~~~^~~~~~~~~~~~
bridge.cpp:25:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |         scanf(" %c",&c1);
      |         ~~~~~^~~~~~~~~~~
bridge.cpp:26:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |         scanf(" %lld",&h1);
      |         ~~~~~^~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37