Compilare: main.cpp: In function 'int main()': main.cpp:75:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<v.size(); j++) ~^~~~~~~~~ main.cpp:86:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<v.size(); j++) ~^~~~~~~~~ main.cpp:109:43: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<PO>::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n",modif.size()); ^ main.cpp:110:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<modif.size(); j++) ~^~~~~~~~~~~~~ main.cpp:36:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("marceland.in","r",stdin); ^ main.cpp:37:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("marceland.out","w",stdout); ^ main.cpp:41:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ main.cpp:45:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n",&n,&m); ^ main.cpp:57:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&ch); ^ main.cpp:73:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^