Submission #548740

#	Time	Username	Problem	Language	Result	Execution time	Memory
548740		ala2	Street Lamps (APIO19_street_lamps)	C++14	0 / 100	117 ms	143564 KiB

street_lamps

#include <bits/stdc++.h>
#define int long long
#define pb push_back
using namespace std;
//int a[1001000];
string s;
int n,T;
vector<pair<int,int>>anss;
vector<int>v[1001000];
vector<int>von[1000100];
vector<int>vtype[1001000];
int bit(int i)
{
    return s[i]=='1'&&s[i+1]=='1';
}
char f(char x)
{
    if(x=='1')
    {
        return '0';
    }
    else return '1';
}
signed main()
{
    cin>>n>>T;
    cin>>s;
    // A 1 B 2
    for(int i=0;i<n-1;i++)
    {
        v[i].pb(0);
        vtype[i].pb(1);
        if(s[i]=='1'&&s[i+1]=='1')
        {
            von[i].pb(1);
        }
        else von[i].pb(0);
    }
    for(int q=1;q<=T;q++)
    {
        string c;
        cin>>c;
        if(c[0]=='q')
            c='B';
        else c='A';
        if(c=="A")
        {
            int i;
            cin>>i;
            i--;
            int old=bit(i);
            s[i]=f(s[i]);
            int nw=bit(i);
            v[i].pb(q);
            vtype[i].pb(1);
            if(nw>old)
            {
                von[i].pb(1);
            }
            else if(old>nw) von[i].pb(0);
            else
            {
                int x=von[i].size();
                von[i].pb(von[i][x-1]);
            }
            continue;

        }
        int a,b;
        cin>>a>>b;
        a--;
        b--;
        int i=a;
        v[i].pb(q);
        int x=von[i].size();
        //cout<<von[i].size()<<endl;
        von[i].pb(von[i][x-1]);
        vtype[i].pb(2);
    }
    for(int i=0;i<n-1;i++)
    {
        int g=0;
        for(int j=1;j<v[i].size();j++)
        {

            if(von[i][j-1]==1&&von[i][j])
             g+=v[i][j]-v[i][j-1];
            if(vtype[i][j]==2)
            {
                int x=g;
                anss.pb({v[i][j],x});
            }
        }
    }
    sort(anss.begin(),anss.end());
    for(auto i:anss)
    {
        cout<<i.second<<endl;
    }

}

// 2 6 11 q 1 2 t 1 q 1 2 q 1 2 t 1 q 1 2

Compilation message (stderr)

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:83:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |         for(int j=1;j<v[i].size();j++)
      |                     ~^~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20