Compilare: main.cpp: In function 'int main()': main.cpp:47:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i + 1 < linii.size(); i++ ) { ~~~~~~^~~~~~~~~~~~~~ main.cpp:49:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( i + 1 < linii.size() && linii[ i + 1 ] == linii[ i ] ) { ~~~~~~^~~~~~~~~~~~~~ main.cpp:14:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &n ); ^ main.cpp:17:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &nr ); ^ main.cpp:31:42: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &a, &b ); ^