제출 #842453

#제출 시각아이디문제언어결과실행 시간메모리
842453peraT-Covering (eJOI19_covering)C++17
25 / 100
72 ms47696 KiB
#include<bits/stdc++.h> using namespace std; #define int long long const int N = 1e6 + 1; int dx[4] = {0 , 0 , -1 , 1}; int dy[4] = {1 , -1 , 0 , 0}; int n , m , ans = 0 , ok = 1; vector<vector<int>> a , v , gd; vector<int> g[N]; main(){ ios::sync_with_stdio(0); cin.tie(0),cout.tie(0); cin >> n >> m; a.resize(n) , v.resize(n); gd.resize(n); for(int i = 0;i < n;i ++){ a[i].resize(m); v[i].resize(m); gd[i].resize(m); for(int j = 0;j < m;j ++){ cin >> a[i][j]; } } int sp;cin >> sp; for(int i = 1;i <= sp;i ++){ int x , y;cin >> x >> y; gd[x][y] = 1; ans += a[x][y]; for(int k = 0;k < 4;k ++){ int I = x + dx[k] , J = y + dy[k]; if(0 <= I && I < n && 0 <= J && J < m){ g[I * m + J].emplace_back(x * m + y); g[x * m + y].emplace_back(I * m + J); } } } for(int i = 0;i < n;i ++){ for(int j = 0;j < m;j ++){ if(v[i][j] == 0 && gd[i][j] == 1){ int spc = 0 , sz = 0 , c = 0; vector<int> q; vector<int> all; q.emplace_back(i * m + j); v[i][j] = 1;/* cout << "st: ";*/ while(c < q.size()){ int vl = q[c ++]; int I = vl / m , J = vl % m;/* cout << I << " " << J << endl;*/ spc += gd[I][J]; if(gd[I][J] == 0) all.emplace_back(a[I][J]); for(int k = 0;k < g[vl].size();k ++){ if(v[g[vl][k] / m][g[vl][k] % m] == 0){ v[g[vl][k] / m][g[vl][k] % m] = 1; q.emplace_back(g[vl][k]); } } sz ++; } /*cout << "---" << endl; cout << "i , j : " << i << " " << j << " " << sz << endl;*/ if(sz < spc * 4){ cout << "NO"; return 0; } assert(all.size() >= spc * 3); sort(all.rbegin() , all.rend()); for(int k = 0;k < spc * 3;k ++){ ans += all[k]; } } } } cout << ans; }

컴파일 시 표준 에러 (stderr) 메시지

covering.cpp:15:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   15 | main(){
      | ^~~~
covering.cpp: In function 'int main()':
covering.cpp:51:13: 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]
   51 |     while(c < q.size()){
      |           ~~^~~~~~~~~~
covering.cpp:57:22: 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]
   57 |      for(int k = 0;k < g[vl].size();k ++){
      |                    ~~^~~~~~~~~~~~~~
In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from covering.cpp:1:
covering.cpp:71:23: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   71 |     assert(all.size() >= spc * 3);
      |            ~~~~~~~~~~~^~~~~~~~~~
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