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line25.sol
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line25.sol
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// SPDX-License-Identifier: MIT
//SPDX-License-Idetifier: Unlicensed
// Interfaces
// Interfaces are contracts that only contain function signatures and events
// Interfaces are used to define the contract API
// Interfaces are implemented by contracts
// Interfaces are not deployed
// Interfaces are not inherited
pragma solidity >=0.7.0;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface base {
function get() external pure returns(uint);
}
contract main is base {
function get() public pure override returns(uint) {
return 1;
}
}