Submission #487583

#	Time	Username	Problem	Language	Result	Execution time	Memory
487583		leaked	Travelling Merchant (APIO17_merchant)	C++14	Compilation error	0 ms	0 KiB

merchant

#include <bits/stdc++.h>

#define f first
#define s second
#define vec vector
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define pw(x) (1LL<<(x))
#define sz(x) (int)(x).size()
#define fast_iati ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);

using namespace std;

template<class T> bool umin(T &a,const  T &b){return (a>b?a=b,1:0);}
template<class T> bool umax(T &a,const  T &b){return (a<b?a=b,1:0);}
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll>pll;
const int N=201;
const int K=2001;
const ll inf=1e16;
int b[N][K],s[N][K];
ll dst[N][N];
ll mx[N][N];
signed main(){
    fast_iati;
    int n,m,k;
    cin>>n>>m>>k;
    for(int i=0;i<n;i++){
        for(int j=0;j<k;j++){
            cin>>b[i][j]>>s[i][j];
        }
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            if(i==j) continue;
            for(int t=0;t<k;t++){
                if(b[i][t]==-1 || s[j][t]==-1) continue;
                umax(mx[i][j],(ll)-b[i][t]+s[j][t]);
            }
        }
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++) dst[i][j]=inf;
        dst[i][i]=0;
    }
    for(int i=0;i<m;i++){
        int v,u,w;
        cin>>v>>u>>w;--v;--u;
        umin(dst[v][u],(ll)w);
    }
    for(int t=0;t<n;t++){
        for(int i=0;i<n;i++){
            for(int j=0;j<n;j++){
                umin(dst[i][j],dst[i][t]+dst[t][j]);
            }
        }
    }
    auto check=[&](ll x){
        vec<vec<ll>>f(n,vec<ll>(n,-inf));
        int iter=n;
        for(int i=0;i<n;i++){
            for(int j=0;j<n;j++){
                if(dst[i][j]<=inf/x && i!=j){
                    umax(f[i][j],mx[i][j]-1ll*x*dst[i][j]);
                }
            }
        }
        vec<ll>dp(n,-inf);
        for(int j=1;j<n;j++) umax(dp[j],f[i][j]);
        while(iter--){
            int ok=0;
            for(int i=0;i<n;i++){
                for(int j=0;j<n;j++){
                    if(umax(dp[j],dp[i]+f[i][j])) ok=1;
                }
            }
            if(!ok){
                break;
            }
            if(iter==0) return 1;
        }
        return (dp[0]>=0);
    };
//    cout<<check(3);
//    return 0;
    ll l=1,r=inf;
    while(l!=r){
        ll mid=(l+r)/2;
        if(check(mid)) l=mid+1;
        else r=mid;
    }
    cout<<l-1;
    return 0;
}

Compilation message (stderr)

merchant.cpp: In lambda function:
merchant.cpp:71:43: error: 'i' was not declared in this scope
   71 |         for(int j=1;j<n;j++) umax(dp[j],f[i][j]);
      |                                           ^
merchant.cpp:84:22: error: inconsistent types 'int' and 'bool' deduced for lambda return type
   84 |         return (dp[0]>=0);
      |                ~~~~~~^~~~