oj.uz

Submission #153129

# Submission time Handle Problem Language Result Execution time Memory
153129 2019-09-12T14:21:08 Z Swan Alternating Current (BOI18_alternating) C++14
0 / 100
 27 ms 4944 KB 
#include <bits/stdc++.h>
#define stop system("pause")
#define INP freopen("input.txt","r",stdin)
#define OUTP freopen("solve1.txt","w",stdout)
#define int long long
using namespace std;

typedef long long ll;

bool c1[1000],c2[1000];
int n,m;

void clean(int n){
    for(int i(0); i < n;i++)c1[i] = c2[i] = 0;
}

void set_color(int x,int y,int c){
    if(x <= y ){
        for(int i(x);i<=y;i++){
            if(c == 0)c1[i] = 1;
            else c2[i] = 1;
        }
    }
    else{
        for(int i(x);i<n;i++){
            if(c == 0)c1[i] = 1;
            else c2[i] = 1;
        }
        for(int i(0);i<=y;i++){
            if(c == 0)c1[i] = 1;
            else c2[i] = 1;
        }
    }
}

bool check(){
    for(int i(0); i < n;i++){
        if(!c1[i] || !c2[i])return 0;
    }
    return 1;
}

main()
{
    ios_base::sync_with_stdio(0);
    cin >> n >> m;
    vector<pair<int,int> > v;
    for(int i(0); i < m;i++){
        int a,b; cin >> a >> b;
        v.push_back({a,b});
    }
    for(int mask(0); mask < (1<<m);mask++){
        clean(n);
        for(int j(0); j < m;j++){
            if(mask&(1<<j))set_color(v[j].first,v[j].second,1);
            else set_color(v[j].first,v[j].second,0);
        }
        if(check()){
            for(int j(0); j < m;j++){
                if(mask&(1<<j))cout << 1;
                else cout << 0;
            }
            return 0;
        }
    }
    cout << "impossible";
    return 0;
}
/*
*/

Compilation message

alternating.cpp:43:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 380 KB 'impossible' claimed, but there is a solution
2 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 380 KB 'impossible' claimed, but there is a solution
2 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 380 KB 'impossible' claimed, but there is a solution
2 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Runtime error 27 ms 4944 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 380 KB 'impossible' claimed, but there is a solution
2 Halted 0 ms 0 KB -