Compilare: main.cpp: In function 'void build_graph(int, int)': main.cpp:6:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i, x, y) for(int i = x; i <= y; ++i) main.cpp:80:9: FOR(i, 0, vec[0][nod].sz() - 1){ ~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:80:5: note: in expansion of macro 'FOR' FOR(i, 0, vec[0][nod].sz() - 1){ ^~~ main.cpp:6:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i, x, y) for(int i = x; i <= y; ++i) main.cpp:84:9: FOR(i, 0, vec[0][nod].sz() - 1){ ~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:84:5: note: in expansion of macro 'FOR' FOR(i, 0, vec[0][nod].sz() - 1){ ^~~ main.cpp:6:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i, x, y) for(int i = x; i <= y; ++i) main.cpp:87:13: FOR(j, 0, vec[1][node].sz() - 1) ~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:87:9: note: in expansion of macro 'FOR' FOR(j, 0, vec[1][node].sz() - 1) ^~~ main.cpp: In function 'int main()': main.cpp:6:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i, x, y) for(int i = x; i <= y; ++i) main.cpp:160:11: FOR(i, 0, vec[0][x].sz() - 1) ~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:160:7: note: in expansion of macro 'FOR' FOR(i, 0, vec[0][x].sz() - 1) ^~~ main.cpp:6:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i, x, y) for(int i = x; i <= y; ++i) main.cpp:161:13: FOR(j, 0, vec[0][y].sz() - 1) ~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:161:9: note: in expansion of macro 'FOR' FOR(j, 0, vec[0][y].sz() - 1) ^~~