oj.uz

Submission #973908

# Submission time Handle Problem Language Result Execution time Memory
973908 2024-05-02T12:42:21 Z SeenSiravit Alternating Heights (CCO22_day1problem1) C++14
6 / 25
 1000 ms 12116 KB 
#include<bits/stdc++.h>

using namespace std;

const int mxN = 3e3 + 5;

int n,k,q;
int a[mxN];
int ans[mxN];

vector<int> g[mxN];
int vis[mxN];
bool valid;

void dfs(int u){
    vis[u] = 1;

    for(auto v : g[u]){
        if(vis[v] == 2) continue;
        else if(vis[v] == 1){
            valid = false;
            return ;
        }else{
            dfs(v);

            if(!valid) return ;
        }
    }

    vis[u] = 2;
}

int main(){

    scanf("%d %d %d",&n,&k,&q);

    for(int i=1;i<=n;i++) scanf("%d",a+i);
    for(int i=1;i<=n;i++) ans[i] = n + 1;

    for(int l=1;l<=n;l++){
        for(int r=l+1;r<=n;r++){
            
            // clear edge and reset vis value
            for(int i=1;i<=k;i++) g[i].clear() , vis[i] = 0;

            // add edge
            int t = 1;
            for(int i=l;i<r;i++){
                if(t == 1) g[a[i]].push_back(a[i+1]);
                else g[a[i+1]].push_back(a[i]);

                t ^= 1;
            }

            valid = true;

            for(int i=l;i<=r;i++){
                if(vis[a[i]] == 0){
                    dfs(a[i]);
                    if(!valid) break;
                }
            }

            if(!valid){
                ans[l] = r;
                break;
            } 
        }
    }

    // for(int i=1;i<=n;i++) printf("%d " , ans[i]);
    // printf("\n");

    while(q--){
        int l,r;
        scanf("%d %d" , &l , &r);

        cout<< (ans[l]<=r ? "NO" : "YES") << "\n";
    }

    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:35:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |     scanf("%d %d %d",&n,&k,&q);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~
Main.cpp:37:32: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     for(int i=1;i<=n;i++) scanf("%d",a+i);
      |                           ~~~~~^~~~~~~~~~
Main.cpp:76:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |         scanf("%d %d" , &l , &r);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 196 ms 3412 KB Output is correct
2 Correct 176 ms 3412 KB Output is correct
3 Correct 175 ms 3412 KB Output is correct
4 Correct 163 ms 3408 KB Output is correct
5 Correct 165 ms 3992 KB Output is correct
6 Correct 178 ms 3340 KB Output is correct
7 Correct 179 ms 3412 KB Output is correct
8 Correct 182 ms 3408 KB Output is correct
9 Correct 377 ms 3636 KB Output is correct
10 Execution timed out 1022 ms 344 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 176 ms 3504 KB Output is correct
2 Correct 176 ms 11092 KB Output is correct
3 Correct 179 ms 10988 KB Output is correct
4 Correct 160 ms 8528 KB Output is correct
5 Correct 160 ms 9416 KB Output is correct
6 Correct 172 ms 11088 KB Output is correct
7 Correct 183 ms 11092 KB Output is correct
8 Correct 203 ms 11056 KB Output is correct
9 Correct 188 ms 11460 KB Output is correct
10 Correct 268 ms 12116 KB Output is correct
11 Correct 262 ms 11896 KB Output is correct
12 Correct 0 ms 516 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Execution timed out 1072 ms 544 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 196 ms 3412 KB Output is correct
2 Correct 176 ms 3412 KB Output is correct
3 Correct 175 ms 3412 KB Output is correct
4 Correct 163 ms 3408 KB Output is correct
5 Correct 165 ms 3992 KB Output is correct
6 Correct 178 ms 3340 KB Output is correct
7 Correct 179 ms 3412 KB Output is correct
8 Correct 182 ms 3408 KB Output is correct
9 Correct 377 ms 3636 KB Output is correct
10 Execution timed out 1022 ms 344 KB Time limit exceeded
11 Halted 0 ms 0 KB -