牛客网浮点错误怎么解决？

qq_42153923 2019-04-28 08:12:41

牛客网上的pat题目：All Roads Lead to Rome，我在自己的vc6.0上没有问题，牛客网显示浮点错误？把浮点错误去掉之后还超时。。。大佬救救孩子

#include <iostream>

#include <vector>

#include <string>

#include <limits.h>



using namespace std;



int N,K,rome;      //the number of cities and routes

string start;

vector<string> city;

vector<int> happiness;

vector<vector<int> > cost;

vector<bool> visit;



int bests, costs, happy, ave_happy;

int correctHappy, correctAveHappy;

int correctCosts=INT_MAX;

vector<int> route,correctRoute;



void dfs(int pre, int present, int end);



int main()

{

	int i,hap;

	string cit;

	ios::sync_with_stdio(false); 

	cin>>N>>K>>start;

	city.resize(N,start);

	happiness.resize(N,0);

	cost.resize(N,vector<int>(N,0));

	visit.resize(N,false);

	for(i=1;i<N;i++)

	{

		cin>>cit>>hap;

		if(cit=="ROM")

			rome=i;

		city[i]=cit;

		happiness[i]=hap;

	}

	string city1,city2;

	int cos,j,m,n;

	for(i=0;i<K;i++)

	{

		cin>>city1>>city2>>cos;

		for(j=0;j<N;j++)

			if(city1==city[j])

			{

				m=j;

				break;

			}

		for(j=0;j<N;j++)

			if(city2==city[j])

			{

				n=j;

				break;

			}

		cost[m][n]=cos;

		cost[n][m]=cos;

	}

	dfs(0,0,rome);

	cout<<bests<<" "<<correctCosts<<" "<<correctHappy<<" "<<correctAveHappy<<endl;

	cout<<city[correctRoute[0]];

	for(i=1;i<correctRoute.size();i++)

		cout<<"->"<<city[correctRoute[i]];

	cout<<endl;



	return 0;

}



void dfs(int pre, int present, int end)

{

	if(costs>correctCosts)

		return;

	int i;

	visit[present]=true;

	costs+=cost[pre][present];

	happy+=happiness[present];

	route.push_back(present);



	if(present==end)

	{

		ave_happy=happy/(route.size()-1);

		if(costs<correctCosts)

		{

			bests=1;

			correctCosts=costs;

			correctRoute=route;

			correctHappy=happy;

			correctAveHappy=ave_happy;

			return;

		}

		else if(costs==correctCosts)

		{

			bests++;

			if(happy>correctHappy)

			{

				correctCosts=costs;

				correctRoute=route;

				correctHappy=happy;

				correctAveHappy=ave_happy;

				return;

			}

			else if(happy==correctHappy)

				if(ave_happy>correctAveHappy)

				{

					correctCosts=costs;

					correctRoute=route;

					correctHappy=happy;

					correctAveHappy=ave_happy;

					return;

				}

		}

	}

	else

		for(i=0;i<N;i++)

			if(!visit[i]&&cost[present][i]!=0)

			{

				dfs(present,i,end);

				route.pop_back();

				costs-=cost[i][present];

				happy-=happiness[i];

				visit[i]=false;

			}

}