Submission #69981

#	Time	Username	Problem	Language	Result	Execution time	Memory
69981		baqargam	parentrises (BOI18_parentrises)	C++14	50 / 100	176 ms	12264 KiB

parentrises

#include<bits/stdc++.h>

using namespace std;

int n,m,k,l,i,j,a,b,bal,li,ri,res[1000005];
string s;
vector<int>vl,vr;

main(){
int p;
cin>>p;

if(p==1)
{
    int t;
    cin>>t;
    while(t--){
        cin>>s;
        n=s.size();
        vl.clear();
        vr.clear();bal=0;li=0;ri=0;
        for(i=0;i<n;i++)res[i]=0;
        for(i=0;i<n;i++){
            if(s[i]=='(')
                vl.push_back(i),bal++;
            else
                vr.push_back(i),bal--;
            if(vr.size()>2*vl.size()) {cout<<"impossible"<<endl;break;}
            if(bal<0){res[vl[li]]=3;li++;res[vr[ri]]=1;ri++;res[vr[ri]]=2;ri++;bal++;}
        }
        if(vr.size()>2*vl.size()) continue;
        vl.clear();
        vr.clear();bal=0;li=0;ri=0;
        for(i=n-1;i>=0;i--){
            if(res[i]!=0) continue;
            if(s[i]==')')
                vl.push_back(i),bal++;
            else
                vr.push_back(i),bal--;
            if(vr.size()>2*vl.size()) {cout<<"impossible"<<endl;break;}
            if(bal<0) {res[vl[li]]=3;li++;res[vr[ri]]=2;ri++;res[vr[ri]]=1;ri++;bal++;}
        }
            if(vr.size()>2*vl.size()) continue;
        for(i=0;i<n;i++){
            if(res[i]==0) cout<<"R";
            if(res[i]==1) cout<<"R";
            if(res[i]==2) cout<<"B";
            if(res[i]==3) cout<<"G";
        }
        cout<<endl;

    }}

}

Compilation message (stderr)

parentrises.cpp:9:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

• Subtask 1: 5 / 5
• Subtask 2: 11 / 11
• Subtask 3: 6 / 6
• Subtask 4: 28 / 28
• Subtask 5: 0 / 6
• Subtask 6: 0 / 16
• Subtask 7: 0 / 28