Submission #287056

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
287056	2020-08-31 10:42:47	wildturtle	T-Covering (eJOI19_covering)	C++14	100 / 100	809 ms	59356 KiB

covering

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#include<bits/stdc++.h>
using namespace std;
int a,b,n,m,k,l,A[1000006],B[1000006],fix[1000006],ans;
vector <int> v1,v[1000006];
void dfs(int x) {
    if(fix[x]==1) return;
    fix[x]=1;
    if(B[x]==1) l++;
    else v1.push_back(-A[x]);
    for(int i=0;i<v[x].size();i++) {
        dfs(v[x][i]);
    }
}
int main() {
    cin>>n>>m;
    for(int i=1;i<=n;i++) {
        for(int j=1;j<=m;j++) {
            cin>>a;
            A[(i-1)*m+j]=a;
        }
    }
    cin>>k;
    for(int i=1;i<=k;i++) {
        cin>>a>>b;
        a++; b++;
        B[(a-1)*m+b]=1; ans+=A[(a-1)*m+b];
        if(a>1) {
            v[(a-1)*m+b].push_back((a-2)*m+b);
            v[(a-2)*m+b].push_back((a-1)*m+b);
        }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

covering.cpp: In function 'void dfs(int)':
covering.cpp:10:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for(int i=0;i<v[x].size();i++) {
      |                 ~^~~~~~~~~~~~
covering.cpp: In function 'int main()':
covering.cpp:48:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |         if(3*l>v1.size()) { cout<<"No"; return 0; }
      |            ~~~^~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 15 / 15
• Subtask 6: 20 / 20
• Subtask 7: 30 / 30