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Submission #23595

# Submission time Handle Problem Language Result Execution time Memory
23595 2017-05-12T20:35:54 Z repeating Jakarta Skyscrapers (APIO15_skyscraper) C++11
0 / 100
 139 ms 262144 KB 
#include <bits/stdc++.h>
#define F first
#define S second
#define P push
#define pb push_back
#define MEM(dp,i) memset(dp,i,sizeof(dp))
#define W while
#define R return
#define C continue
#define SI size()
#define ll long long
#define pll pair<ll,ll>
#define SF(x) scanf("%I64d",&x)

using namespace std;
const long long INF = 2e9;
long long MOD = 1e9+7;
ll n,m;
ll a[2222],b[2222];
ll dp[300005];
vector<ll> adj[30005];
ll pos;
stack<ll> s;
ll DP(ll x){
    if(x<0||x>=m)R INF;
    if(x==pos)R 0;
    ll &ret=dp[x];
    if(ret!=-1)R ret;
    ret=INF;
    ll d;
    for(int i=0;i<adj[x].SI;i++){
        d=adj[x][i];
        for(int j=x+d,q=1;j<m;q++,j+=d){s.P(j);ret=min(ret,DP(j)+q);}
        for(int j=x-d,q=1;j>=0;q++,j-=d){s.P(j);ret=min(ret,DP(j)+q);}
    }
    W(!s.empty()){
        dp[s.top()]=-1;
        s.pop();
    }
    for(int i=0;i<adj[x].SI;i++){
        d=adj[x][i];
        for(int j=x+d,q=1;j<m;q++,j+=d){ret=min(ret,DP(j)+q);}
        for(int j=x-d,q=1;j>=0;q++,j-=d){ret=min(ret,DP(j)+q);}
    }
    R ret;
}
map<ll,bool> M[30005];
int main(){
    MEM(dp,-1);
    cin>>m>>n;
    for(int i=0;i<n;i++){
        cin>>a[i]>>b[i];
        if(M[a[i]][b[i]])C;
        M[a[i]][b[i]]=1;
        adj[a[i]].pb(b[i]);
    }
    pos=a[1];
    if(DP(0)==INF)cout<<-1;
    else cout<<DP(a[0]);
}

Compilation message

skyscraper.cpp: In function 'long long int DP(long long int)':
skyscraper.cpp:31:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<adj[x].SI;i++){
                  ^
skyscraper.cpp:40:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<adj[x].SI;i++){
                  ^

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Memory limit exceeded 129 ms 262144 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Memory limit exceeded 103 ms 262144 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Memory limit exceeded 119 ms 262144 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Memory limit exceeded 103 ms 262144 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Memory limit exceeded 139 ms 262144 KB Memory limit exceeded
2 Halted 0 ms 0 KB -