oj.uz

Submission #41663

# Submission time Handle Problem Language Result Execution time Memory
41663 2018-02-20T10:59:45 Z repeating Jakarta Skyscrapers (APIO15_skyscraper) C++11
0 / 100
 18 ms 22120 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 ld long double
#define pll pair<ll,ll>
#define pii pair<int,int>
#define SF(x) scanf("%Id",&x)
#define SF2(x,y) scanf("%Id%Id",&x,&y)
#define SF3(x,y,z) scanf("%I64d%I64d%I64d",&x,&y,&z)
#define SF4(x,y,z,o) scanf("%I64d%I64d%I64d%I64d",&x,&y,&z,&o)
#define all(v) v.begin(),v.end()

using namespace std;
const long long INF = 1e9;
const long long MOD = 1e9+7;
const int MX=30015;
int n,m;
int x[MX],y[MX];
const int sq=173;
int dp[30005][sq+4];
vector<int> v[MX];
int DP(int x,int j){
    if(x<0||x>=n)R INF;
//    cout<<x<<" "<<j<<endl;
    if(x==1)R 0;
    int &ret=dp[x][j];
    if(ret!=-1)R ret;
    ret=INF;
    for(auto i : v[x]){
        if(i<sq){ret=min(ret,DP(x,i));}
    }
    if(j!=0)
        ret=min(ret,DP(x+j,j)+1),ret=min(ret,DP(x-j,j)+1);
    for(auto k : v[x]){
        if(k>=sq){
            for(int i=x,j1=0;i>=0;i-=k,j1++){
                ret=min(ret,DP(i,0)+j1);
            }
            for(int i=x,j1=0;i<n;i+=k,j1++){
                ret=min(ret,DP(i,0)+j1);
            }
        }

    }
//    cout<<x<<" "<<j<<" "<<ret<<endl;
    R ret;

}
int main(){
    MEM(dp,-1);
    cin>>n>>m;
    for(int i=0;i<m;i++){
        cin>>x[i]>>y[i];
        v[x[i]].pb(y[i]);
    }
    if(DP(0,0)==INF)cout<<-1;
    else
    cout<<DP(0,0);
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 21752 KB Output is correct
2 Incorrect 17 ms 21860 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 21900 KB Output is correct
2 Incorrect 18 ms 22008 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 22008 KB Output is correct
2 Incorrect 17 ms 22120 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 22120 KB Output is correct
2 Incorrect 17 ms 22120 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 22120 KB Output is correct
2 Incorrect 18 ms 22120 KB Output isn't correct
3 Halted 0 ms 0 KB -