Compilare: user.cpp: In function ‘void dfs_gt(int)’: user.cpp:15:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[x].size(); ++i) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:21:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < T[x].size(); ++i) ^ user.cpp: In function ‘void tare_conex()’: user.cpp:27:10: warning: unused variable ‘k’ [-Wunused-variable] int i,j,k,x,g[nmax]; ^ user.cpp:27:12: warning: unused variable ‘x’ [-Wunused-variable] int i,j,k,x,g[nmax]; ^ user.cpp:27:14: warning: unused variable ‘g’ [-Wunused-variable] int i,j,k,x,g[nmax]; ^ user.cpp: In function ‘void create()’: user.cpp:50:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < G[i].size(); ++j) ^ user.cpp: In function ‘void topsort()’: user.cpp:59:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < P[i].size(); ++j) ^ user.cpp:68:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < P[q[i]].size();++j){ ^ user.cpp: In function ‘void dinamica()’: user.cpp:80:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < P[i].size(); ++j) ^ user.cpp:92:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < K[i].size(); ++j) ^ user.cpp:103:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < f[i].size(); ++j) ^ user.cpp: In function ‘int main()’: user.cpp:114:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.in","r",stdin); ^ user.cpp:115:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.out","w",stdout); ^ user.cpp:117:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&n,&m); ^ user.cpp:119:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]