Compilare: user.cpp: In function ‘void runGdf(int)’: user.cpp:18:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < G[x].size() ; ++i) ^ user.cpp: In function ‘void runTdf(int)’: user.cpp:35:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < T[x].size() ; ++i) ^ user.cpp: In function ‘void runReduction()’: user.cpp:67:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < G[i].size() ; ++j) ^ user.cpp: In function ‘void runGsort()’: user.cpp:100:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < aG[x].size() ; ++i) ^ user.cpp:115:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < aG[x].size() ; ++j) ^ user.cpp: In function ‘void runTsort()’: user.cpp:141:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < aT[x].size() ; ++i) ^ user.cpp:156:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < aT[x].size() ; ++j) ^ user.cpp: In function ‘void solve()’: user.cpp:170:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < ssc[i].size() ; ++j) ^ user.cpp:177:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < answer.size() ; ++i) ^ user.cpp: In function ‘int main()’: user.cpp:184:37: 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:185:39: 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:187:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &n); ^ user.cpp:188:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &m); ^ user.cpp:192:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &x); ^ user.cpp:193:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]