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Submission #1044986

# Submission time Handle Problem Language Result Execution time Memory
1044986 2024-08-05T15:22:04 Z vjudge1 Street Lamps (APIO19_street_lamps) C++17
40 / 100
 99 ms 42412 KB 
#include "bits/stdc++.h"
using namespace std;

#define int int64_t    
#define pb push_back

using lint=__int128_t;

const int lim=200100;
const int mod=1e9+7;

using pii=pair<int,int>;

struct query{
    int t,x,y;
};

signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#ifdef Local  
    freopen(".in","r",stdin);freopen(".out1","w",stdout);
#endif
    int n,m;
    cin>>n>>m;
    string s;
    cin>>s;
    query q[m];
    for(int i=0;i<m;i++){
        string t;
        cin>>t;
        if(t=="toggle"){
            q[i].t=0;
        }else{
            q[i].t=1;
        }
        if(q[i].t){
            cin>>q[i].x>>q[i].y;
        }else{
            cin>>q[i].x;
        }
            q[i].x--,q[i].y--;
    }
    if(n<=100&&m<=100){
        int arr[m+1][n];
        for(int i=0;i<n;i++){
            arr[0][i]=s[i]-'0';
        }
        for(int i=0;i<m;i++){
            for(int j=0;j<n;j++){
                arr[i+1][j]=arr[i][j];
                if(i&&!q[i-1].t&&q[i-1].x==j){
                    arr[i+1][j]=!arr[i+1][j];
                }
                //cerr<<arr[i+1][j]<<" ";
            }//cerr<<"\n";
            if(q[i].t){
                int cnt=0;
                //cerr<<q[i].x<<" "<<q[i].y<<"\n";
                for(int j=0;j<=i;j++){
                    bool ok=1;
                    for(int k=q[i].x;k<q[i].y;k++){
                        if(!arr[j+1][k]){
                            ok=0;
                            break;
                        }
                    }
                    cnt+=ok;
                }
                cout<<cnt<<"\n";
            }
        }
    }else{
        bool ok=1;
        for(int i=0;i<m;i++){
            if(q[i].t&&q[i].x+1!=q[i].y){
                ok=0;
                break;
            }
        }
        if(ok){
            vector<int>toggles[n];
            for(int i=0;i<n;i++){
                toggles[i].pb(-1);
            }
            vector<int>qr[n];
            for(int i=0;i<m;i++){
                if(!q[i].t)toggles[q[i].x].push_back(i);
                else qr[q[i].x].pb(i);
            }
            int ans[m];
            for(int i=0;i<n;i++){
                int state=s[i]-'0';
                int tp=0,cur=0;
                for(int j=0;j+1<toggles[i].size();j++){
                    while(tp<qr[i].size()&&qr[i][tp]<=toggles[i][j+1]){
                        ans[qr[i][tp]]=cur+state*(qr[i][tp]-toggles[i][j]);
                        assert(0<=qr[i][tp]&&qr[i][tp]<m);
                        tp++;
                    }
                    cur+=state*(toggles[i][j+1]-toggles[i][j]);
                    state=!state;
                }
                while(tp<qr[i].size()){
                    ans[qr[i][tp]]=cur+state*(qr[i][tp]-toggles[i][toggles[i].size()-1]);
                    tp++;
                }
            }
            for(int i=0;i<m;i++){
                if(q[i].t)cout<<ans[i]<<"\n";
            }
        }
    }
}

Compilation message

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:94:32: warning: comparison of integer expressions of different signedness: 'int64_t' {aka 'long int'} and 'std::vector<long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   94 |                 for(int j=0;j+1<toggles[i].size();j++){
      |                             ~~~^~~~~~~~~~~~~~~~~~
street_lamps.cpp:95:29: warning: comparison of integer expressions of different signedness: 'int64_t' {aka 'long int'} and 'std::vector<long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |                     while(tp<qr[i].size()&&qr[i][tp]<=toggles[i][j+1]){
      |                           ~~^~~~~~~~~~~~~
street_lamps.cpp:103:25: warning: comparison of integer expressions of different signedness: 'int64_t' {aka 'long int'} and 'std::vector<long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |                 while(tp<qr[i].size()){
      |                       ~~^~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 14148 KB Output is correct
2 Correct 45 ms 14700 KB Output is correct
3 Correct 50 ms 15220 KB Output is correct
4 Correct 94 ms 39016 KB Output is correct
5 Correct 98 ms 39480 KB Output is correct
6 Correct 85 ms 38372 KB Output is correct
7 Correct 99 ms 40980 KB Output is correct
8 Correct 99 ms 42412 KB Output is correct

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 42 ms 14148 KB Output is correct
9 Correct 45 ms 14700 KB Output is correct
10 Correct 50 ms 15220 KB Output is correct
11 Correct 94 ms 39016 KB Output is correct
12 Correct 98 ms 39480 KB Output is correct
13 Correct 85 ms 38372 KB Output is correct
14 Correct 99 ms 40980 KB Output is correct
15 Correct 99 ms 42412 KB Output is correct
16 Incorrect 0 ms 344 KB Output isn't correct
17 Halted 0 ms 0 KB -