Submission #1204790

#TimeUsernameProblemLanguageResultExecution timeMemory
1204790Trn115지도 색칠하기 (GA3_map)C++20
Compilation error
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; struct DSU { int n; vector<int> p, sz; DSU() = default; DSU(int n) : n(n), p(n + 1, 0), sz(n + 1, 0) {} void make_set(int v) { p[v] = v; sz[v] = 1; } void init() { for (int i = 1; i <= n; ++i) make_set(i); } int find_set(int v) { return v == p[v] ? v : p[v] = find_set(p[v]); } void union_sets(int u, int v) { u = find_set(u); v = find_set(v); if (u != v) { if (sz[u] < sz[v]) swap(u, v); sz[u] += sz[v]; p[v] = u; } } }; inline int getbit(int x, int i) { return (x >> i) & 1; } inline void invertbit(int &x, int i) { x ^= (1 << i); } long long NumberOfMaps (int N, int M, int *A, int *B) { vector<vector<int>> g(N + 1); DSU dsu(N); dsu.init(); for (int i = 0; i < M; ++i) { g[min(A[i], B[i])].push_back(max(A[i], B[i])); dsu.union_sets(A[i], B[i]); } vector<bool> mark(N + 1); vector<vector<int>> ccs(N + 1); for (int i = 1; i <= N; ++i) { ccs[dsu.find_set(i)].push_back(i); } long long cur; // vector<int> color(N + 1, 0); // vector<vector<bool>> used(N + 1, vector<bool>(4, false)); vector<int> used(N + 1, 0); function<void(int, int, int)> backtrack = [&](int s, int i, int sz) { int v = ccs[s][i]; if (i == sz) { ++cur; return; } // for (int x : g[v]) used[color[x] - 1] = true; int limit = i == 0 ? 1 : 4; for (int j = 1; j <= limit; ++j) { if (getbit(used[v], j - 1)) continue; // color[v] = j; bool ok = true; vector<int> pre; for (int x : g[v]) { pre.push_back(getbit(used[x], j - 1)); if (!getbit(used[x], j - 1)) { invertbit(used[x], j - 1); if (used[x] == 0b1111) { ok = false; } } } if (ok) backtrack(s, i + 1, sz); int k = 0; for (int x : g[v]) { // used[x][j - 1] = pre[k]; if (getbit(used[x], j - 1) != pre[k]) { invertbit(used[x], j - 1); } ++k; } // color[v] = 0; } };

Compilation message (stderr)

map.cpp: In function 'long long int NumberOfMaps(int, int, int*, int*)':
map.cpp:99:11: error: expected '}' at end of input
   99 |         };
      |           ^
map.cpp:45:55: note: to match this '{'
   45 | long long NumberOfMaps (int N, int M, int *A, int *B) {
      |                                                       ^
map.cpp:99:11: warning: no return statement in function returning non-void [-Wreturn-type]
   99 |         };
      |           ^