Compilare: main.cpp: In function 'void solveMap()': main.cpp:122:50: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<std::pair<int, char> >::size_type {aka long unsigned int}' [-Wformat=] fprintf(out, "%d %d\n", sol.size() + 1, first.y) ; ^ main.cpp: In function 'void solveMat()': main.cpp:50:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d\n", &coords) ; ^ main.cpp:53:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %c\n", &cell, &dir) ; ^ main.cpp: In function 'void solveMap()': main.cpp:106:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &n, &m) ; ^ main.cpp:111:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &val) ; ^ main.cpp: In function 'int main()': main.cpp:130:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d\n", &query) ; ^