Compilare: main.cpp: In function 'void DFSA(int, int)': main.cpp:17:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for (int i = 0; i < A[node].size(); ++ i) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void DFSB(int, int)': main.cpp:38:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for (int i = 0; i < B[node].size(); ++ i) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'bool BFS(int)': main.cpp:74:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for (int i = 0; i < G[u].size(); ++ i) { | ~~^~~~~~~~~~~~~ main.cpp: In function 'int DFSUtil(int, int)': main.cpp:96:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 96 | for (int &i = ptr[node]; i < G[node].size(); ++ i) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int maxMatch(std::vector<std::vector<int> >, int, int)': main.cpp:158:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 158 | while (t = DFSUtil(0, 1e9)) | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int DP(int, int)': main.cpp:185:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 185 | for (int i = 0; i < A[u].size(); ++ i) { | ~~^~~~~~~~~~~~~ main.cpp:192:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 192 | for (int i = 0; i < B[v].size(); ++ i) { | ~~^~~~~~~~~~~~~ main.cpp:201:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 201 | for (int i = 0; i < c.size(); ++ i) { | ~~^~~~~~~~~~ main.cpp:204:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 204 | for (int j = 0; j < d.size(); ++ j) | ~~^~~~~~~~~~ main.cpp:210:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 210 | if (maxMatch(mat, c.size(), d.size()) == d.size()) { | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~