제출 #248751

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
248751		proma	T-Covering (eJOI19_covering)	C++17	25 / 100	382 ms	102404 KiB

covering

#include <bits/stdc++.h>
#define endl "\n"
#define int long long
#define see(x) cerr<<#x<<"="<<x<<endl;

using namespace std;

const int N = 1002;

int m, n, k, used[N*N], cnt, ans, val[N*N], spec[N*N];
map <pair <int, int>, int> def;
vector <int> g[N*N], values;

void dfs (int v) {
	used[v] = 1;
	if (spec[v]) ++ cnt;
	else values.push_back(val[v]);

	for (auto i: g[v])
		if (!used[i]) dfs(i);
}

int32_t main () {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    cin >> m >> n;

    int temp = 1;
    for (int i = 0; i < m; ++ i)
    	for (int j = 0; j < n; ++ j) {
    		int a; cin >> a;
    		val[temp] = a;
    		def[{i, j}] = temp ++;
    	}

   	cin >> k;

   	for (int i = 0; i < k; ++ i) {
   		int x, y;
   		cin >> x >> y;
   		ans += val[def[{x,y}]];
   		spec[def[{x,y}]] = 1;
   		if (x) {
   			g[def[{x,y}]].push_back(def[{x-1,y}]);
   			g[def[{x-1,y}]].push_back(def[{x,y}]);
   		}
   		if (y) {
   			g[def[{x,y}]].push_back(def[{x,y-1}]);
   			g[def[{x,y-1}]].push_back(def[{x,y}]);
   		}
   		if (x < m-1) {
   			g[def[{x,y}]].push_back(def[{x+1,y}]);
   			g[def[{x+1,y}]].push_back(def[{x,y}]);
   		}
   		if (y < n-1) {
   			g[def[{x,y}]].push_back(def[{x,y+1}]);
   			g[def[{x,y+1}]].push_back(def[{x,y}]);
   		}
   	}

   	temp = 1;
   	for (int i = 0; i < m; ++ i)
   		for (int j = 0; j < n; ++ j) {
   			if (!used[temp]) {
   				values.clear();
   				cnt = 0;
   				dfs(temp);
   				sort(values.rbegin(), values.rend());
   				if (3*cnt > values.size()) {
   					cout << "No\n";
   					return 0;
   				}
   				for (int k = 0; k < 3*cnt; ++ k)
   					ans += values[k];
   			}
   			++ temp;
   		}

   	cout << ans << endl;

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

covering.cpp: In function 'int32_t main()':
covering.cpp:30:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for (int i = 0; i < m; ++ i)
     ^~~
covering.cpp:37:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
     cin >> k;
     ^~~
covering.cpp:70:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
        if (3*cnt > values.size()) {
            ~~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 10 / 10
• Subtask 5: 15 / 15
• Subtask 6: 0 / 20
• Subtask 7: 0 / 30