Compilare: main.cpp: In function 'void citire()': main.cpp:49:37: warning: narrowing conversion of 'g[y].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()' from 'std::vector<Edge>::size_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing] g[x].push_back({y, g[y].size(), 0, 1}); ~~~~~~~~~^~ main.cpp:50:40: warning: narrowing conversion of '(g[x].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >() - 1ul)' from 'std::vector<Edge>::size_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing] g[y].push_back({x, g[x].size() - 1, 0, 1}); ~~~~~~~~~~~~^~~ main.cpp: In function 'int bfs()': main.cpp:65:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < g[from].size(); k ++) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int dfs(int, int)': main.cpp:84:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = rem[from]; k < g[from].size(); k ++) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'bool ok(int)': main.cpp:117:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < g[i].size(); k ++) { ~~^~~~~~~~~~~~~ main.cpp: In function 'void DistStart()': main.cpp:168:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < g[from].size(); k ++) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void DistFinish()': main.cpp:194:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < g[from].size(); k ++) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void citire()': main.cpp:42:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &nrsol); ^ main.cpp:45:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &c); ^ main.cpp: In function 'int main()': main.cpp:209:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trafic.in", "r", stdin); ^ main.cpp:210:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trafic.out", "w", stdout); ^