Compilare: main.cpp: In function 'void eulerDfs(int, int)': main.cpp:47:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < g[from].size(); k ++) { ~~^~~~~~~~~~~~~~~~ In file included from /usr/include/c++/6/cassert:44:0, from main.cpp:6: main.cpp:60:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(whereTata < g[from].size()); ~~~~~~~~~~^~~~~~~~~~~~~~~~ main.cpp:63:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = whereTata + 1; k < g[from].size(); k ++) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:124:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < produse.size(); i ++) { ~~^~~~~~~~~~~~~~~~ main.cpp:131:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < euler.size(); i ++) { ~~^~~~~~~~~~~~~~ main.cpp:137:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 1; k < eulerApar[i].size(); k ++) { ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void citire()': main.cpp:24:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ main.cpp:27:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nrVecini); ^ main.cpp:30:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &to); ^ main.cpp:36:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &t); ^ main.cpp: In function 'int main()': main.cpp:149:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sushi2.in", "r", stdin); ^ main.cpp:150:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sushi2.out", "w", stdout); ^