Submission #56595

#	Time	Username	Problem	Language	Result	Execution time	Memory
56595		leejseo	Palembang Bridges (APIO15_bridge)	C++98	22 / 100	85 ms	1780 KiB

bridge

#include <bits/stdc++.h>
using namespace std;
 
int K, N;
 
void solve1(){
	long long ans = 0;
	vector<int> L;
	int u, v;
	char x, y;
	for(int i=0; i<N; i++){
		scanf("%c %d %c %d\n", &x, &u, &y, &v);		
		if (x == y) ans += abs(u-v);
		else{
			L.push_back(u);
			L.push_back(v);
		}
	}
	sort(L.begin(), L.end());
	int M = L.size();
	if (M == 0){
		printf("%lld\n", ans);
		return;
	}
	long long mid = L[M/2];
	for (int i=0; i<M; i++) ans += abs(L[i] - mid);
	ans += M/2;
	printf("%lld\n", ans);
	L.clear();
	return;
}
 
void solve2(){
	long long ans = 0;
	vector<int> S;
	vector<int> X;
	vector<int> Y;
	int u, v;
	char x, y;
	for(int i=0; i<N; i++){
		scanf("%c %d %c %d\n", &x, &u, &y, &v);		
		if (x == y) ans += abs(u-v);
		else{
			S.push_back(u+v);
			X.push_back(u);
			Y.push_back(v);
		}
	}
	int M = X.size();
	if (M == 0){
		printf("%lld\n", ans);
		return;
	}
	long long cross = (int) 1e17;
	long long temp;
	sort(S.begin(), S.end());
	for (int i=0; i<M; i++){
		int s = S[i];
		vector<int> lo, hi;
		for (int j=0; j<M; j++){
			if (X[j] + Y[j] < s){
				lo.push_back(X[j]);
				lo.push_back(Y[j]);
			}
			else{
				hi.push_back(X[j]);
				hi.push_back(Y[j]);
			}
		}
		sort(lo.begin(), lo.end());
		sort(hi.begin(), hi.end());
		temp = 0LL;
		for (int j=0; j<lo.size(); j++) temp += abs(lo[j] - lo[lo.size()/2]);
		for (int j=0; j<hi.size(); j++) temp += abs(hi[j] - hi[hi.size()/2]);
		cross = min(cross, temp);
	}
	ans += cross;
	ans += M;
	printf("%lld\n", ans);
	return;
}
int main(void){
	scanf("%d%d\n", &K, &N);
	if (K == 1) solve1();
	else solve2();
}

Compilation message (stderr)

bridge.cpp: In function 'void solve2()':
bridge.cpp:73:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j=0; j<lo.size(); j++) temp += abs(lo[j] - lo[lo.size()/2]);
                 ~^~~~~~~~~~
bridge.cpp:74:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j=0; j<hi.size(); j++) temp += abs(hi[j] - hi[hi.size()/2]);
                 ~^~~~~~~~~~
bridge.cpp: In function 'void solve1()':
bridge.cpp:12:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%c %d %c %d\n", &x, &u, &y, &v);  
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bridge.cpp: In function 'void solve2()':
bridge.cpp:41:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%c %d %c %d\n", &x, &u, &y, &v);  
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bridge.cpp: In function 'int main()':
bridge.cpp:83:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d\n", &K, &N);
  ~~~~~^~~~~~~~~~~~~~~~~~

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