Compilare: main.cpp: In function 'bool verif(int)': main.cpp:32:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1 ; i < v.size() ; i++) ~~^~~~~~~~~~ main.cpp:50:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v.size() ; i++) ~~^~~~~~~~~~ main.cpp:62:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v.size() ; i++) ~~^~~~~~~~~~ main.cpp:82:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v.size() ; i++) ~~^~~~~~~~~~ main.cpp:94:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v.size() ; i++) ~~^~~~~~~~~~ main.cpp:114:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v.size() ; i++) ~~^~~~~~~~~~ main.cpp:123:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v.size() ; i++) ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:131:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("patrate.in","r",stdin); ^ main.cpp:132:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("patrate.out","w",stdout); ^ main.cpp:134:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:137:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^