#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx,avx2,sse,sse2")
#include<bits/stdc++.h>
#define int long long
//#define ll long long
#define down cout<<'\n';
#define NHP ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define modwwe int t;cin>>t; while(t--)
#define bit(i,j) (i>>j&1)
#define sobit(a) __builtin_popcountll(a)
#define task "test"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".ans","w",stdout)
#define pb push_back
#define checktime cerr << (double)clock() / CLOCKS_PER_SEC * 1000 << " ms";
using namespace std;
void phongbeo();
const int mod2=1e9+7;
const int mod1=998244353;
struct icd
{
int a,b;
};
struct ib
{
int a;
int b;
};
struct ic
{
int a,b,c;
};
struct id
{
int a,b,c,d;
};
struct ie
{
int a,b,c, d,e,f;
};
int n,m,s1,s2,s4,s3,sf,k,r,mid,s5,s6,mx,s7,s8,s9,mx2,res,dem2=0,dem=0,l;
int i,s10,s12;
int el=29;
main()
{
#ifndef ONLINE_JUDGE
//fin(task),fou(task);
#endif
//NHP
/// cin>>s1;
// modwwe
phongbeo(),down
}
struct cmp
{
bool operator()(ic a,ic b)
{
return a.a>b.a;
}
};
int color[201];
vector<ic> v[201];
int dp[201][201];
id a[50001];
bool b[50001];
int diditcha(int c,int y)
{
priority_queue<ic,vector<ic>,cmp>p;
p.push({0,c,0});
memset(color,-1,sizeof color);
while(!p.empty())
{
ic x=p.top();
p.pop();
if(color[x.b]!=-1) continue;
color[x.b]=x.c;
if(x.b==y) return x.a;
for(auto f:v[x.b])
p.push({x.a+f.b,f.a,f.c});
}
return 1e17;
}
void del(int x,int y)
{
for(int i=0; i<v[x].size(); i++)
if(v[x][i].c==y)
{
v[x].erase(v[x].begin()+i);
return;
}
}
void add(int x,int y,int s2,int c)
{
v[x].pb({y,s2,c});
}
void phongbeo()
{
cin>>n;
for(int i=1; i<=n; i++)
{
for(int j=1; j<=n; j++)
dp[i][j]=1e17;
dp[i][i]=0;
}
cin>>m;
for(int j=1; j<=m; j++)
{
cin>>l>>r>>s2>>s3;
a[j]= {l,r,s2,s3};
v[l].pb({r,s2,j});
dp[l][r]=min(dp[l][r],s2);
}
for(int k=1; k<=n; k++)
for(int i=1; i<=n; i++)
for(int j=1; j<=n; j++)
dp[i][j]=min(dp[i][j],dp[i][k]+dp[k][j]);
s4+=diditcha(1,n);
s2=n;
while(color[s2]!=0)
{if(s2==a[color[s2]].a){cout<<s2; exit(0);}
b[color[s2]]=1,s2=a[color[s2]].a;
}
s5+= diditcha(n,1);
s3=s4+s5;
s2=1;
while(color[s2]!=0)
{ //cout<<color[s2],down
if(s2==a[color[s2]].a){cout<<s2; exit(0);}
b[color[s2]]=1,s2=a[color[s2]].a;
}
for(int j=1; j<=m; j++)
if(b[j])
{
del(a[j].a,j),add(a[j].b,a[j].a,a[j].c,j);
s5=diditcha(1,n);
s4=diditcha(n,1);
s3=min({s4+s5+a[j].c+a[j].d,s3});
del(a[j].b,j),add(a[j].a,a[j].b,a[j].c,j);
}
else s3=min(s3,min(dp[1][a[j].b]+dp[a[j].a][n]+a[j].c,dp[1][n])+min(dp[n][a[j].b]+dp[a[j].a][1]+a[j].c,dp[n][1])+a[j].d);
if(s3>=1e17)cout<<-1;
else cout<<s3;
}
Compilation message
ho_t4.cpp:45:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
45 | main()
| ^~~~
ho_t4.cpp: In function 'void del(long long int, long long int)':
ho_t4.cpp:87:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<ic>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
87 | for(int i=0; i<v[x].size(); i++)
| ~^~~~~~~~~~~~
ho_t4.cpp: In function 'void phongbeo()':
ho_t4.cpp:116:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
116 | for(int i=1; i<=n; i++)
| ^~~
ho_t4.cpp:119:13: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
119 | s4+=diditcha(1,n);
| ^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
856 KB |
Output is correct |
| 2 |
Incorrect |
6 ms |
604 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
62 ms |
7944 KB |
Output is correct |
| 2 |
Correct |
62 ms |
7672 KB |
Output is correct |
| 3 |
Correct |
55 ms |
6720 KB |
Output is correct |
| 4 |
Correct |
7 ms |
856 KB |
Output is correct |
| 5 |
Correct |
8 ms |
860 KB |
Output is correct |
| 6 |
Incorrect |
8 ms |
604 KB |
Output isn't correct |
| 7 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
860 KB |
Output is correct |
| 2 |
Incorrect |
6 ms |
604 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
856 KB |
Output is correct |
| 2 |
Incorrect |
6 ms |
604 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
