Compilare: main.cpp: In function 'int main()': main.cpp:40:21: warning: array subscript has type 'char' [-Wchar-subscripts] c[x][c[x][0]] = w < g; ^ main.cpp:44:21: warning: array subscript has type 'char' [-Wchar-subscripts] c[y][c[y][0]] = w < g; ^ main.cpp:17:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &n, &m, &g); ^ main.cpp:28:41: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &x, &y, &w); ^