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 runGmark(int)’: user.cpp:86:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < aG[x].size() ; ++i) ^ user.cpp: In function ‘void runTmark(int)’: user.cpp:98:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < aT[x].size() ; ++i) ^ user.cpp: In function ‘void solve()’: user.cpp:121:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < ssc[i].size() ; ++j) ^ user.cpp:128:34: 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:135:37: 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:136:39: 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:138:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &n); ^ user.cpp:139:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &m); ^ user.cpp:143:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &x); ^ user.cpp:144:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &y); ^