oj.uz

Submission #908774

# Submission time Handle Problem Language Result Execution time Memory
908774 2024-01-16T20:12:21 Z alexander707070 Escape Route (JOI21_escape_route) C++17
5 / 100
 9000 ms 112148 KB 
#include<bits/stdc++.h>
#include "escape_route.h"

#define MAXN 107
using namespace std;
 
const long long inf=1e17;
 
struct edge{
    int to;
    long long l,c;
};
 
int n,m,qs,minv,from,to;
long long s,w,ans;
vector<long long> sol;
int a[10007],b[10007];
long long l[10007],c[10007];
long long dist[MAXN][MAXN],dst[MAXN];
vector<edge> v[MAXN];

int li[MAXN],tim;
 
priority_queue< pair<long long,int> , vector< pair<long long,int> > , greater< pair<long long,int> > > q;
 
void dijkstra(int x){
    for(int i=1;i<=n;i++){
        dist[x][i]=inf;
    }
    dist[x][x]=0; tim++;
    q.push({0,x});
 
    while(!q.empty()){
        minv=q.top().second;
        q.pop();
 
        if(li[minv]==tim)continue;
        li[minv]=tim;
 
        for(int i=0;i<v[minv].size();i++){
            if(li[v[minv][i].to]==tim or dist[x][v[minv][i].to]<=dist[x][minv]+v[minv][i].l or dist[x][minv]>v[minv][i].c-v[minv][i].l)continue;
            dist[x][v[minv][i].to]=dist[x][minv]+v[minv][i].l;
            q.push({dist[x][v[minv][i].to],v[minv][i].to});
        }
    }
}
 
void query(int x,long long t){
    for(int i=1;i<=n;i++){
        dst[i]=inf;
    }
    dst[x]=t; tim++;
    q.push({t,x});
 
    while(!q.empty()){
        minv=q.top().second;
        q.pop();
 
        if(li[minv]==tim)continue;
        li[minv]=tim;
 
        for(int i=0;i<v[minv].size();i++){
            if(li[v[minv][i].to]==tim or dst[v[minv][i].to]<=dst[minv]+v[minv][i].l or dst[minv]>v[minv][i].c-v[minv][i].l)continue;
            dst[v[minv][i].to]=dst[minv]+v[minv][i].l;
            q.push({dst[v[minv][i].to],v[minv][i].to});
        }
    }
}
 
bool u[MAXN][MAXN][MAXN];
long long dp[MAXN][MAXN][MAXN];
 
long long ff(int x,int y,int day){
    if(x==y)return 0;
    if(day>n)return inf;
 
    if(u[x][y][day])return dp[x][y][day];
    u[x][y][day]=true;
    dp[x][y][day]=inf;
 
    for(int p=1;p<=n;p++){
        if(dist[x][p]!=inf){
            if(p!=y){
                dp[x][y][day]=min(dp[x][y][day],ff(p,y,day+1)+s);
            }else{
                dp[x][y][day]=min(dp[x][y][day],ff(p,y,day+1)+dist[x][y]);
            }
        }
    }
 
    return dp[x][y][day];
}
 
vector<long long> calculate_necessary_time(int N, int M, long long S, int Q, vector<int> A, vector<int> B, vector<long long> L, vector<long long> C, vector<int> U,vector<int> V, vector<long long> T){
    n=N; m=M; s=S; qs=Q;
    
    for(int i=1;i<=m;i++){
        a[i]=A[i-1]; b[i]=B[i-1]; l[i]=L[i-1]; c[i]=C[i-1];
        a[i]++; b[i]++;
        v[a[i]].push_back({b[i],l[i],c[i]});
        v[b[i]].push_back({a[i],l[i],c[i]});
    }
 
    for(int i=1;i<=n;i++){
        dijkstra(i);
    }
 
    for(int i=1;i<=qs;i++){
        from=U[i-1]; to=V[i-1]; w=T[i-1];
        from++; to++;
 
        query(from,w); ans=inf;

        for(int f=1;f<=n;f++){
            if(dst[f]!=inf){
                if(f!=to)ans=min(ans,s+ff(f,to,0));
                else ans=min(ans,dst[to]);
            }
        }
 
        sol.push_back(ans-w);
    }

    return sol;
}

Compilation message

escape_route.cpp: In function 'void dijkstra(int)':
escape_route.cpp:40:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for(int i=0;i<v[minv].size();i++){
      |                     ~^~~~~~~~~~~~~~~
escape_route.cpp: In function 'void query(int, long long int)':
escape_route.cpp:62:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |         for(int i=0;i<v[minv].size();i++){
      |                     ~^~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 64984 KB Output is correct
2 Correct 22 ms 65116 KB Output is correct
3 Correct 37 ms 65116 KB Output is correct
4 Correct 13 ms 65192 KB Output is correct
5 Correct 27 ms 65112 KB Output is correct
6 Correct 17 ms 65112 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 9020 ms 112148 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 64984 KB Output is correct
2 Correct 22 ms 65116 KB Output is correct
3 Correct 37 ms 65116 KB Output is correct
4 Correct 13 ms 65192 KB Output is correct
5 Correct 27 ms 65112 KB Output is correct
6 Correct 17 ms 65112 KB Output is correct
7 Execution timed out 9020 ms 112148 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 64984 KB Output is correct
2 Correct 22 ms 65116 KB Output is correct
3 Correct 37 ms 65116 KB Output is correct
4 Correct 13 ms 65192 KB Output is correct
5 Correct 27 ms 65112 KB Output is correct
6 Correct 17 ms 65112 KB Output is correct
7 Execution timed out 9020 ms 112148 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 64984 KB Output is correct
2 Correct 22 ms 65116 KB Output is correct
3 Correct 37 ms 65116 KB Output is correct
4 Correct 13 ms 65192 KB Output is correct
5 Correct 27 ms 65112 KB Output is correct
6 Correct 17 ms 65112 KB Output is correct
7 Execution timed out 9020 ms 112148 KB Time limit exceeded
8 Halted 0 ms 0 KB -