Compilare: main.cpp: In function 'int main()': main.cpp:75:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < pr[ v[i] ].size(); j++){ ~~^~~~~~~~~~~~~~~~~~~ main.cpp:78:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ii < d[i + 1].size() && d[i + 1][ii].f < x){ ~~~^~~~~~~~~~~~~~~~~ main.cpp:81:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ii < d[i + 1].size() && d[i + 1][ii].f == x){ ~~~^~~~~~~~~~~~~~~~~ main.cpp:89:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[i - 1].size(); ii++){ ~~~^~~~~~~~~~~~~~~~~ main.cpp:94:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[i].size(); ii++){ ~~~^~~~~~~~~~~~~ main.cpp:99:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[i].size(); ii++){ ~~~^~~~~~~~~~~~~ main.cpp:107:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[j].size(); ii++){ ~~~^~~~~~~~~~~~~ main.cpp:113:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[j + 2].size(); ii++){ ~~~^~~~~~~~~~~~~~~~~ main.cpp:120:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[j + 1].size(); ii++){ ~~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int num()': main.cpp:37:36: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(sir, 1, DIM, fin); ^ main.cpp:46:36: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(sir, 1, DIM, fin); ^ main.cpp: In function 'int main()': main.cpp:53:28: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(sir, 1, DIM, fin); ^